I’m perhaps a little unusual in that all of my ‘customers’ are vehicle based laptops rather than desktops. Add to this that I’m not allowed to make any sort of connection to the company LAN (which sports very potent network access control anyway) and I have to have FOG on an isolated network.
At home though for my sandpit system like yourself I’m running pfSense on a repurposed Watchguard appliance with it doing the dhcp and tftp stuff.
I really expected that a reboot of the FOG server would have cleared the dhcp leases. We live and learn…