Below is an update to the wall framing plan that includes suggestions from visitor comments and the final dimensions of the trailer. I’m pretty sure this is it. If it looks over built you’re right. But you’ll notice that each panel section uses 2x4s no longer than 36″ and that the exterior could be covered in pallet boards 16″ wide. Good thing my trailer is really heavy duty. I’ll make the door by hand. The window dimensions are the only thing that might change. I’ll draw the floor and roof plan next.