I'm planning on building a 5' x 5' x 10.5' foamie. But we need a porta-potti, and instead of taking 40% of the galley away for that space, I thought I could put the bed sideways (across the width) and build a slideout for the foot of the bed on the driver's side. That frees up a 20" wide floor space across the camper in front of the bed for a porta-potti.
I would elevate the bed about 12" to incorporate 3 drawers underneath to use half the space under the bed. The rest of the underbed space could be used for a battery / electronics compartment and possibly long drawers (4' front to back) in the galley.
I've been working on a design for the slideout and have combined several images into one to get by the 3 attachment limit:
The drawer slides are heavy duty 3/4" x 3" x 24" lock-open type. I'm thinking of adding rubber door-sweep style seals that press against the top and sides of the slideout box to help with moisture resistance when open. Of course where needed there will be hard points on the foam.
Comments? Does this look feasible?
(Edited to clarify that the bed is oriented across the trailer instead of lengthwise and the placement of the porta-potti.)