I have some old L3+ laying around. I've been thinking about making a custom box for them, out of wood. Making them look like a nice piece of furniture.

I thought I could pull (2) of the hash boards and the controller board out, install some quiet fans, put a raspberry pi to bridge a wifi connection through the ethernet port, and power the entire thing with a PC 750w PSU. I can get the boards down to about 160 Watts each) Figure I'd be about 400W with the Boards, Controllers, and Fans.

I have some family members that use space heaters quite a bit, and I thought they would get a kick out of watching their wallet tick up, instead of getting $0 for powering their space heater.

Terrible idea, or awesome present? (Fully aware they sell things like this, but I like making stuff.)