I think I've you can set up your own local $ETH chain for the purposes of testing out and developing smart contacts. Otherwise, a chain with a single source of concensus (your server) kind of defeats the purpose of using a block chain to begin with

If you have docker desktop installed, try linuxserver's overseerr container.

I have a MINISFORUM NPB5 Mini PC with 32GB DDR5 and an Intel Core i5-13500H which hosts all of my *arr docker containers + plex Media server (and a few other stuff). You can get one for less than 500$. I also have a NAS with a bunch of HDDs that gives me a ton of storage space. If you must know, its a Terramaster F5-422 and tbh I wouldn't recommend it.