I'm curious about why it needs to be low power. The electricity needed for most computers doesn't cost very much, at least not in the US. You could get away wit

I'm curious about why it needs to be low power. The electricity needed for most computers doesn't cost very much, at least not in the US. You could get away with using an old laptop instead of a Pi and difference in cost of power consumption is negligible. You could also check out Mac Minis and SFF PCs as your budget allows. I have a 2009 Mac Mini server with two drive bays. It's not the most powerful thing but it can be yours if you want it.