Are you using linux-surface or have their patches been upstreamed to mainline now? I have a surface pro 6 I was running fedora on & haven’t touched in a few years. Curious as to the current status

guess it’s not his turn with the braincell

Any dual-nic SBC should be fine. My roommate & I run it on a i3 dual-nic small machine, but that’s almost overpowered. prior to that I ran it on a vm on proxmox, worked fine mostly, just a bit of a headache setting up the networking initially.