My use case is a homelab kubernetes cluster, so I want multiple nodes for redundancy, but I don’t want to use too much electricity or generate too much heat. But for the sake of other readers, let’s keep it general:
What’s a nice little computer for a homelab, with its own power supply, ethernet, and room for 2 internal disks?
This is the way. I have an HP ProDesk 600 G4 with an i5-8500T, and it has been sipping 7 W for years now. Just be aware, most of these boxes only have one 2.5" SATA and one M.2 2280 bay. For HP, the ProDesk 600 and EliteDesk 800 have another M.2 2280 slot. Also be aware, you need a special internal cable for that SATA bay, so if you buy one of these make sure it has that cable in it already.