I built an enclosure with a single sheet if plywood it has been working for 4 years.
The cost was the price of one sheet of plywood and some wood glue a few nails a couple of plastic sheets for doors an a long hinge.

Box.jpg

The Twins 2018-3.jpg

Updated power socket to 4 plugs. Needed for two raspberry Pi Octoprint controllers.
I also have a 2200Smart APC UPS battery Backup the enclosure plugs into.