@george1421 Thank you for the answer.
Not sure what you mean about the scale I propose. You mean bandwidth issues?
It even might be more than the suggested 100 “remote nodes” like 200-300.
Update frequency is very low. Primary task will be Win10 to Linux deployment.
So 1 Linux image and i case this will fail, 1 Windows 10 image are store on the remote node.

I will look for documentation about both options:
1 HQ master and remote storage nodes

2 Mobile FOG deployment. If I you understand correctly, I already have that in place for testing.
A local PC with FOG server on it. Not sure how to handle the dnsmasq.
The local network has already a DHCP server (router) that I cannot configure.
I need another company for that. But ones the concept is working, I can ask to change the router options to support a bootfile and pxe-server ip.

Option 2 requires a ‘management’ solution, so maybe option 1 is in place.
We don’t want ‘boots’ on the floor and require a endpoint management solution at HQ.

I’am looking for a (partial) open source solution to transfer like 500 Windows 10 PC’s (with HP Secure Boot ) into a Linux OS (version not known yet).
These 500 PC’s are located in about 100 locations.
I already played in a local environment, with FOG and it worked great.
Besides the Secure boot issue I can transform a Windows PC to a Linux PC.
I use a NUC running Proxmox and a Debian VM with Fog on it.
Instead of managing 100 NUC’s with Fog, I was looking for a solution like running Foc on a central location, to manage the 100 NUC’s on the remote location.
These NUC’s are only for PXE boot and image storage/deployment.
I this sort of solution possible with Fog or are there other solutions?
Any advice is welcome!

Thanks in advance!!