I agree with using TrueNAS, I currently have a Fujitsu Futro S920 that can host two mirrored SSDs, it is a cheap build if you don’t have to host any services, you can found details here: https://pietro.in/en/posts/futro-s920-proxmox/

For more powerful hardware but still staying in a cheap build take a look at an HP 800 G4 mini or a ThinkCentre M910x both can host two NVME disks

Basically, simulating a WebRTC call allows a user to access the Tor network in a country where connections are monitored. Through NAT Traversal two users are brought into communication without opening any ports to the outside of the network

https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/wikis/Technical Overview