Elitedesks with Ryzen (G4 I think) - a few of them run my desktop k8s cluster, one a minecraft server for my kid, one a family server with ownlclound and other goodies, one runs Netflix, YT and so on, and another one runs Lakka and a ton of retro games. One cost me around €200 which is an excellent value for money.

(Yes there are newer models but they are more expensive and some of them much larger which makes the whole deal unattractive.)