Sketches for a TTT

I want to admit up front that Dan's Camp Pod and Mike's Weekender were more than an inspiration, I "borrowed" heavily.
Anyhow, there are two sketches for a TTT I'm considering building in my album. Like Dan my needs are (in order of priority) enclosed transportation and storage of a piece of equipment, occasional transportation of building materials, and occasional sleep overs. Finally I need relatively easy removal and reinstallation to allow for the use of just the flat bed trailer.
Walls and roof would be 1.25" plywood/foam. I'm worried about weight being a hinderance to the removal/reinstallation idea.
Anyhow, there are two sketches for a TTT I'm considering building in my album. Like Dan my needs are (in order of priority) enclosed transportation and storage of a piece of equipment, occasional transportation of building materials, and occasional sleep overs. Finally I need relatively easy removal and reinstallation to allow for the use of just the flat bed trailer.
Walls and roof would be 1.25" plywood/foam. I'm worried about weight being a hinderance to the removal/reinstallation idea.