The new Mac Mini M2 is a great deal, it's sold for around $600.

You can run a full Bitcoin node (syncs overnight), play around with Stable Diffusion (generates a new image in a few seconds), and overall it works extremely fast, and it's a tiny and silent machine. Also, it uses a very small amount of power (max 50W)

Also, pretty much all the software is already ported to this new ARM arch, so there are mostly no issues, just extra performance.