I use proxmox on my server. I virtualize opnsense (with adguard and wireguard), jellyfin, unifi, home assistant, and syncthing.
I have a synology ds220j w/ 2x10tb
Hardware: Intel 12100, 32gb ram, i350-t4 network card TP link TL-SG108E switch
I'm going to move opnsense to a dedicated box eventually
It works offline for me on my steamdeck.