@lanodan @quad I guess you're looking at replicating some data center infra at home.
First thing would be a UPS. Ideally two, one for your server(s) to bridge a 30 min glitch, and a second one with enough juice to keep your networking gear up for a day or so.
Next step is having some ilo/idrac capability on your server(s) so you can get things back on the rails if needed.
Wondering if a Proxmox cluster over Wireguard VPN would work. I guess it should, if slowly.