The LXLE distro is "almost" ready to be booted over PXE with one exception:
The NetworkManager service is starting on boot, even if the IP has been already assigned in the earlier stage of booting. This causes the link to break, and the boot process fails/hangs short after starting NetworkManager.

Suggestion:
add the following to /etc/init/network-manager.conf

=begin=

        if [ ! -n "$(grep "ip=dhcp" /proc/cmdline)" ]; then
               exec NetworkManager
        fi

=end=