I designed this DIY crossfit style home gym so that it can fold out of the wall. When folded up it takes up less than 4 sq ft of floor space and only takes about 8 hours to build. The cabinet made out of 3/4" and 1/2" furniture grade plywood that is glued and screwed together. This cabinet was designed for my loft, which has 9-foot tall ceilings, but the design could be adapted for different spaces.