Keeping this thread alive.
I know this is an old post - and that the trailer has already been sold.
But this is very close to the 5 x 8 cargo trailer conversion I am planning to build so I thought I would move it back to the top.
I also want to mimic the teardrop floor plan with the queen bed up front and galley at the back.
The under bed "basement" is a great idea.
I will also hang some cabinets over the foot section of the bed.
A Fantastic 12v fan will handle ventilation.
I am still debating going with a torsion axle, but I like the option of the spring over axle for larger tires.