I'll second this. My "home lab" is several small computers crammed wherever they can either be totally hidden, or where they can justify their presence. An old

I'll second this. My "home lab" is several small computers crammed wherever they can either be totally hidden, or where they can justify their presence. An old Celeron NUC lives under my couch, and it runs Pi-Hole, Syncthing, and some diagnostic stuff. It's extremely useful, and the impact on my electric bill is negligible. A Lenovo mini PC lives behind my TV, and serves double duty as a Syncthing node and an HTPC. I'll probably make it do other stuff eventually. It's not the most sophisticated setup on earth, but it works great, it's dirt cheap, and it's apartment-friendly.