Well I posted a thread a while back asking for info on a small trailer being towed by a goofy little car. I decided to draw it up in CAD and see how it looked. Side profile can be cut from a 4x8 sheet. No side windows or doors yet and there is some framing missing but you get the idea. The floor is built up with 2xs so there are no fenderwells to take up bed space.
Overall height = 5'-0"~
Interior height = 36"
Bed length = 6'-8"~
Bed width = 4'-10"
8" wheels