Cut off a 21-in.-long board for the shelves, rip it in the middle to make two shelves, and cut 45-degree bevels on the two long front edges with a router or table saw. Bevel the ends of the other board, cut dadoes, which are grooves cut into the wood with a router or a table saw with a dado blade, cross- wise (cut a dado on scrap and test-fit the shelves first!) and cut it into four narrower boards, two at 1-3/8 in. wide and two at 4 in.
The big advantage to buying a pre-built camper is that it’s already built out, so you won’t have to wait to hit the road. Many feature innovative ways to convert the living space into a sleeping area, and may even include a bathroom/shower. These vehicles should also have electrical, plumbing, propane, and water systems already installed (although if you want solar power, you’ll likely need to add this yourself). woodworking shop design