DSP is pretty good, definitely feels like 3d factorio but has a bit of a different philosophy on how production and logistics work. The latest major update added enemies and military management to the game, which gives it a better focus for your production.

Either trueNAS or unraid work as a vm in Proxmox, but there’s some caveats. You have to pass the whole hba/lsi pcie device to the vm so you can’t split the backplane of the server.