A cheap, simple, but fully-functional 3D printer enclosure whose size can be customized. It uses Home Depot-brand yardsticks, 3/8" wooden dowels, plywood, and Saran wrap. It's a great intermediate solution between a Plexiglas enclosure, and a plastic tub.

All you need to print is 8 of these brackets, either the dowel-hole version, or the yardstick-hole version. No supports or special considerations required.