Does anyone have any good tips on beds to install in a motovan. I have a standard length e150. I was considering two options so far. The first is to build a box over each wheel well and then have a piece of plywood to bridge the gap and then put an air mattress on top. My second idea was to buy a small cot and mount it against the wall and have it on a hinge to fold down. I am looking for ideas to keep the bed elevated so that I do not have to move everything in it to set the air mattress on the floor. Any tips or advice is greatly appreciated.