diff --git a/install.sh b/install.sh
index 41abcb6..dd9dd9d 100755
--- a/install.sh
+++ b/install.sh
@@ -13,6 +13,14 @@
 #     - curl -sfL https://get.hauler.dev | HAULER_VERSION=1.0.0 bash
 #     - HAULER_VERSION=1.0.0 ./install.sh
 #
+#   Set Install Directory
+#     - curl -sfL https://get.hauler.dev | HAULER_INSTALL_DIR=/usr/local/bin bash
+#     - HAULER_INSTALL_DIR=/usr/local/bin ./install.sh
+#
+# Debug Usage:
+#   - curl -sfL https://get.hauler.dev | HAULER_DEBUG=true bash
+#   - HAULER_DEBUG=true ./install.sh
+#
 # Uninstall Usage:
 #   - curl -sfL https://get.hauler.dev | HAULER_UNINSTALL=true bash
 #   - HAULER_UNINSTALL=true ./install.sh
@@ -21,7 +29,7 @@
 #   - https://hauler.dev
 #   - https://github.com/hauler-dev/hauler
 
-# set functions for debugging/logging
+# set functions for logging
 function verbose {
     echo "$1"
 }
@@ -36,60 +44,87 @@ function warn {
 
 function fatal {
     echo && echo "[ERROR] Hauler: $1"
-    exit 0
+    exit 1
 }
 
-# check for required dependencies
-for cmd in sudo rm curl grep mkdir sed awk openssl tar; do
+# debug hauler from argument or environment variable
+if [ "${HAULER_DEBUG}" = "true" ]; then
+    set -x
+fi
+
+# start hauler preflight checks
+info "Starting Preflight Checks..."
+
+# check for required packages and dependencies
+for cmd in echo curl grep sed rm mkdir awk openssl tar install source; do
     if ! command -v "$cmd" &> /dev/null; then
-        fatal "$cmd is not installed"
+        fatal "$cmd is required to install Hauler"
     fi
 done
 
-# set version environment variable
-if [ -z "${HAULER_VERSION}" ]; then
-    version="${HAULER_VERSION:-$(curl -s https://api.github.com/repos/hauler-dev/hauler/releases/latest | grep '"tag_name":' | sed 's/.*"v\([^"]*\)".*/\1/')}"
-else
-    version="${HAULER_VERSION}"
+# set install directory from argument or environment variable
+HAULER_INSTALL_DIR=${HAULER_INSTALL_DIR:-/usr/local/bin}
+
+# ensure install directory exists
+if [ ! -d "${HAULER_INSTALL_DIR}" ]; then
+    mkdir -p "${HAULER_INSTALL_DIR}" || fatal "Failed to Create Install Directory: ${HAULER_INSTALL_DIR}"
 fi
 
-# set uninstall environment variable from argument or environment
+# ensure install directory is writable (by user or root privileges)
+if [ ! -w "${HAULER_INSTALL_DIR}" ]; then
+    if [ "$(id -u)" -ne 0 ]; then
+        fatal "Root privileges are required to install Hauler to Directory: ${HAULER_INSTALL_DIR}"
+    fi
+fi
+
+# uninstall hauler from argument or environment variable
 if [ "${HAULER_UNINSTALL}" = "true" ]; then
     # remove the hauler binary
-    sudo rm -f /usr/local/bin/hauler || fatal "Failed to Remove Hauler from /usr/local/bin"
+    rm -rf "${HAULER_INSTALL_DIR}/hauler" || fatal "Failed to Remove Hauler from ${HAULER_INSTALL_DIR}"
 
-    # remove the installation directory
-    rm -rf "$HOME/.hauler" || fatal "Failed to Remove Directory: $HOME/.hauler"
+    # remove the working directory
+    rm -rf "$HOME/.hauler" || fatal "Failed to Remove Hauler Directory: $HOME/.hauler"
 
-    info "Hauler Uninstalled Successfully"
+    info "Successfully Uninstalled Hauler" && echo
     exit 0
 fi
 
+# set version environment variable
+if [ -z "${HAULER_VERSION}" ]; then
+    # attempt to retrieve the latest version from GitHub
+    HAULER_VERSION=$(curl -s https://api.github.com/repos/hauler-dev/hauler/releases/latest | grep '"tag_name":' | sed 's/.*"v\([^"]*\)".*/\1/')
+
+    # exit if the version could not be detected
+    if [ -z "${HAULER_VERSION}" ]; then
+        fatal "HAULER_VERSION is unable to be detected and/or retrieved from GitHub"
+    fi
+fi
+
 # detect the operating system
-platform=$(uname -s | tr '[:upper:]' '[:lower:]')
-case $platform in
+PLATFORM=$(uname -s | tr '[:upper:]' '[:lower:]')
+case $PLATFORM in
     linux)
-        platform="linux"
+        PLATFORM="linux"
         ;;
     darwin)
-        platform="darwin"
+        PLATFORM="darwin"
         ;;
     *)
-        fatal "Unsupported Platform: $platform"
+        fatal "Unsupported Platform: $PLATFORM"
         ;;
 esac
 
 # detect the architecture
-arch=$(uname -m)
-case $arch in
+ARCH=$(uname -m)
+case $ARCH in
     x86_64 | x86-32 | x64 | x32 | amd64)
-        arch="amd64"
+        ARCH="amd64"
         ;;
     aarch64 | arm64)
-        arch="arm64"
+        ARCH="arm64"
         ;;
     *)
-        fatal "Unsupported Architecture: $arch"
+        fatal "Unsupported Architecture: $ARCH"
         ;;
 esac
 
@@ -97,85 +132,84 @@ esac
 info "Starting Installation..."
 
 # display the version, platform, and architecture
-verbose "- Version: v$version"
-verbose "- Platform: $platform"
-verbose "- Architecture: $arch"
+verbose "- Version: v${HAULER_VERSION}"
+verbose "- Platform: $PLATFORM"
+verbose "- Architecture: $ARCH"
+verbose "- Install Directory: ${HAULER_INSTALL_DIR}"
 
-# check if install directory exists, create it if not
+# check working directory and/or create it
 if [ ! -d "$HOME/.hauler" ]; then
-    mkdir -p "$HOME/.hauler" || fatal "Failed to Create Directory: ~/.hauler"
+    mkdir -p "$HOME/.hauler" || fatal "Failed to Create Directory: $HOME/.hauler"
 fi
 
-# change to install directory
-cd "$HOME/.hauler" || fatal "Failed to Change Directory: ~/.hauler"
+# update permissions of working directory
+chmod -R 777 "$HOME/.hauler" || fatal "Failed to Update Permissions of Directory: $HOME/.hauler"
+
+# change to working directory
+cd "$HOME/.hauler" || fatal "Failed to Change Directory: $HOME/.hauler"
+
+# start hauler artifacts download
+info "Starting Download..."
 
 # download the checksum file
-if ! curl -sfOL "https://github.com/hauler-dev/hauler/releases/download/v${version}/hauler_${version}_checksums.txt"; then
-    fatal "Failed to Download: hauler_${version}_checksums.txt"
+if ! curl -sfOL "https://github.com/hauler-dev/hauler/releases/download/v${HAULER_VERSION}/hauler_${HAULER_VERSION}_checksums.txt"; then
+    fatal "Failed to Download: hauler_${HAULER_VERSION}_checksums.txt"
 fi
 
 # download the archive file
-if ! curl -sfOL "https://github.com/hauler-dev/hauler/releases/download/v${version}/hauler_${version}_${platform}_${arch}.tar.gz"; then
-    fatal "Failed to Download: hauler_${version}_${platform}_${arch}.tar.gz"
+if ! curl -sfOL "https://github.com/hauler-dev/hauler/releases/download/v${HAULER_VERSION}/hauler_${HAULER_VERSION}_${PLATFORM}_${ARCH}.tar.gz"; then
+    fatal "Failed to Download: hauler_${HAULER_VERSION}_${PLATFORM}_${ARCH}.tar.gz"
 fi
 
 # start hauler checksum verification
 info "Starting Checksum Verification..."
 
 # verify the Hauler checksum
-expected_checksum=$(awk -v version="$version" -v platform="$platform" -v arch="$arch" '$2 == "hauler_"version"_"platform"_"arch".tar.gz" {print $1}' "hauler_${version}_checksums.txt")
-determined_checksum=$(openssl dgst -sha256 "hauler_${version}_${platform}_${arch}.tar.gz" | awk '{print $2}')
+EXPECTED_CHECKSUM=$(awk -v HAULER_VERSION="${HAULER_VERSION}" -v PLATFORM="${PLATFORM}" -v ARCH="${ARCH}" '$2 == "hauler_"HAULER_VERSION"_"PLATFORM"_"ARCH".tar.gz" {print $1}' "hauler_${HAULER_VERSION}_checksums.txt")
+DETERMINED_CHECKSUM=$(openssl dgst -sha256 "hauler_${HAULER_VERSION}_${PLATFORM}_${ARCH}.tar.gz" | awk '{print $2}')
 
-if [ -z "$expected_checksum" ]; then
-    fatal "Failed to Locate Checksum: hauler_${version}_${platform}_${arch}.tar.gz"
-elif [ "$determined_checksum" = "$expected_checksum" ]; then
-    verbose "- Expected Checksum: $expected_checksum"
-    verbose "- Determined Checksum: $determined_checksum"
-    verbose "- Successfully Verified Checksum: hauler_${version}_${platform}_${arch}.tar.gz"
+if [ -z "${EXPECTED_CHECKSUM}" ]; then
+    fatal "Failed to Locate Checksum: hauler_${HAULER_VERSION}_${PLATFORM}_${ARCH}.tar.gz"
+elif [ "${DETERMINED_CHECKSUM}" = "${EXPECTED_CHECKSUM}" ]; then
+    verbose "- Expected Checksum: ${EXPECTED_CHECKSUM}"
+    verbose "- Determined Checksum: ${DETERMINED_CHECKSUM}"
+    verbose "- Successfully Verified Checksum: hauler_${HAULER_VERSION}_${PLATFORM}_${ARCH}.tar.gz"
 else
-    verbose "- Expected: $expected_checksum"
-    verbose "- Determined: $determined_checksum"
-    fatal "Failed Checksum Verification: hauler_${version}_${platform}_${arch}.tar.gz"
+    verbose "- Expected: ${EXPECTED_CHECKSUM}"
+    verbose "- Determined: ${DETERMINED_CHECKSUM}"
+    fatal "Failed Checksum Verification: hauler_${HAULER_VERSION}_${PLATFORM}_${ARCH}.tar.gz"
 fi
 
-# uncompress the archive
-tar -xzf "hauler_${version}_${platform}_${arch}.tar.gz" || fatal "Failed to Extract: hauler_${version}_${platform}_${arch}.tar.gz"
+# uncompress the hauler archive
+tar -xzf "hauler_${HAULER_VERSION}_${PLATFORM}_${ARCH}.tar.gz" || fatal "Failed to Extract: hauler_${HAULER_VERSION}_${PLATFORM}_${ARCH}.tar.gz"
 
-# install the binary
-case "$platform" in
-    linux)
-        sudo install -m 755 hauler /usr/local/bin || fatal "Failed to Install Hauler to /usr/local/bin"
-        ;;
-    darwin)
-        sudo install -m 755 hauler /usr/local/bin || fatal "Failed to Install Hauler to /usr/local/bin"
-        ;;
-    *)
-        fatal "Unsupported Platform or Architecture: $platform/$arch"
-        ;;
-esac
+# install the hauler binary
+install -m 755 hauler "${HAULER_INSTALL_DIR}" || fatal "Failed to Install Hauler: ${HAULER_INSTALL_DIR}"
 
 # add hauler to the path
-if [ -f "$HOME/.bashrc" ]; then
-    echo "export PATH=$PATH:/usr/local/bin/" >> "$HOME/.bashrc"
-    source "$HOME/.bashrc"
-elif [ -f "$HOME/.bash_profile" ]; then
-    echo "export PATH=$PATH:/usr/local/bin/" >> "$HOME/.bash_profile"
-    source "$HOME/.bash_profile"
-elif [ -f "$HOME/.zshrc" ]; then
-    echo "export PATH=$PATH:/usr/local/bin/" >> "$HOME/.zshrc"
-    source "$HOME/.zshrc"
-elif [ -f "$HOME/.profile" ]; then
-    echo "export PATH=$PATH:/usr/local/bin/" >> "$HOME/.profile"
-    source "$HOME/.profile"
-else
-    echo "Failed to add /usr/local/bin to PATH: Unsupported Shell"
+if [[ ":$PATH:" != *":${HAULER_INSTALL_DIR}:"* ]]; then
+    if [ -f "$HOME/.bashrc" ]; then
+        echo "export PATH=\$PATH:${HAULER_INSTALL_DIR}" >> "$HOME/.bashrc"
+        source "$HOME/.bashrc"
+    elif [ -f "$HOME/.bash_profile" ]; then
+        echo "export PATH=\$PATH:${HAULER_INSTALL_DIR}" >> "$HOME/.bash_profile"
+        source "$HOME/.bash_profile"
+    elif [ -f "$HOME/.zshrc" ]; then
+        echo "export PATH=\$PATH:${HAULER_INSTALL_DIR}" >> "$HOME/.zshrc"
+        source "$HOME/.zshrc"
+    elif [ -f "$HOME/.profile" ]; then
+        echo "export PATH=\$PATH:${HAULER_INSTALL_DIR}" >> "$HOME/.profile"
+        source "$HOME/.profile"
+    else
+        warn "Failed to add ${HAULER_INSTALL_DIR} to PATH: Unsupported Shell"
+    fi
 fi
 
 # display success message
-info "Successfully Installed at /usr/local/bin/hauler"
+info "Successfully Installed Hauler at ${HAULER_INSTALL_DIR}/hauler"
 
 # display availability message
-verbose "- Hauler v${version} is now available for use!"
+info "Hauler v${HAULER_VERSION} is now available for use!"
 
 # display hauler docs message
 verbose "- Documentation: https://hauler.dev" && echo