Trailer ideas?

I’m thinking of having an enclosed snowmobile trailer built and I want to be able to put the rzr inside. I measure my rzr at 70" at the highest point. The finished height of the ceiling is projected to be just under 71". I plan to tie the rzr down with tire nets allowing the suspension of the rzr to move. I’m concerned about the roof hitting the ceiling. I could leave a section of ceiling out over the high point of the rzr roof between the crossmembers giving me about three inches, or I could lower the floor between the crossmembers for the rear wheels to sit in. I was wondering if there was some type of a tub that was available that I could weld or bolt in to cut down on fabrication. A quick google search didn’t turn anything up, but maybe I’m not using the fight term. The third option is have the trailer built with a roof that’s six inches taller. It’s only 2-3 hundred for the higher roof but I’d like to keep it as short as possible. Thought about a beaver tail but I’m not sure that would put the rzr in the right spot for weight distribuition on a 14+5 V nose trailer. I also don’t want to decrease ground clearance at the back of the trailer.

Ideas?