@vince-villarreal Two other points.
You can build a usb boot drive with iPXE, but again that still relies on dhcp having the right settings to instruct ipxe on how to find the fog server.
You can also build a FOS usb boot disk, that will boot you right into FOS bypassing PXE altogether. But there are some caveats with this approach. If you can overlook the caveats and just want to capture and deploy (no multicast, no direct imaging from iPXE menus, etc) it will work for you.
One last comment, fog doesn’t like it when/if you change the IP address of the fog server once the FOG management console is installed. There are work arounds, but its best to have it at its assigned (forever) address when you install FOG.