I know this isn't really a tiny trailer. I have a 20'lx7.5'wx6.5't skeleton cargo trailer. The top is 1" steel and I'd like to keep unnecessary weight off those bars if at all possible. I'm making it into a trailer for my reptiles as well as hopefully a spare bed. Basically I want a.fully insulated outdoor shed on wheels so I can take it with me during moves. As such it's definitely getting a mini split and I'm kinda playing with the idea of doing a half foamie sort of deal. I was thinking of doing frp or 1/8th ply skin on the front and bottom 3-4' of the trailer sides to help with wind force from the road. The ply skin would still be backed in foam
In fact I was thinking I would glue the foam to the skin for strength. The top half of the sides and the back would still be foam walls only and I was planning on covering the whole thing in pmf. Because of the volume of face to cover smoothly I was thinking polyester mesh(Henry's roof fabric), burlap, or even polystyrene mesh(blown insulation fabric). For the pmf paint I was thinking I'd use regular outdoor paint and do 75% water, 50% water, 25% water, full paint method ive seen but I also have a ton of roofing paint to use up so I was having mixed feelings on the best top coats. I have a ton of Henry's roofing paint, ames max blue, and ames super stretch. This is gonna be left out in the weather most likely in Washington. So as sealed as I can possibly get it is important. I was also thinking about using some wood to make shallow arches on the top beams and then bending foam over the top to make a domed roof to allow a significant less pooling.
So I wanna hear your thoughts. Insulation, skin type, pmf methods, paint, sloped roof etc. The good bad and ugly. The goal is cheap and quality. Quality more important than cheap. Appeal is honestly the least important but it's still a bonus. I know I don't wanna do aluminum. I am willing to ply all over if that's smarter. I'm willing to do a lot of things.