mwaters on Nostr: https://community.torproject.org/relay/setup/guard/ I don't think it has to be ...

https://community.torproject.org/relay/setup/guard/

I don't think it has to be substantial, the Tor configuration can be tuned to fit the 'hardware'.

I was running one on our VDSL without an issue, when we upgraded to fibre I just increased the bandwidth limits a little.