I recently got the Beelink Mini S12 Pro. I’m completely impressed with its capabilities, especially for that price. I got the 16GB Ram N100 version. Great piece of hardware.
I’m running 27 different services, including the *Arrs, Jellyfin, paperless-ngx, home assistant, and even stuff like Kasm workspaces and emulatorjs.
I think you can get the full Orange Pi kit (Pi + sd + power adapter + case) for around 60 bucks on Amazon. There’s also the option of going with a mini PC, you could find them from around 120 bucks.
I know you’re not asking for hardware recommendations, but using an old PC may increase your electric bill way more than any of these options, so that’s something to bear in mind.
I just have the included 500GB SSD and an external 2TB HDD, but I’m planning on getting a 4TB 2.5" SSD to put it inside the mini PC, since it has an extra slot for that.