Just an observation. If you do get an enclosed trailer, it's dry (unloaded) weight is going to eat up a lot of your available towing capacity [the highest I've seen is 3500 lbs--the current JK (not the JKU) is rated for 2000 lbs]. Earlier in the thread you had mentioned you were going to try to make a camping trailer out of it. Have you considered a classic "Teardrop" ?
Very nice build BTW. The only other conversions I had ever seen were made from full size PU trucks (almost always Chevys). Yours is just....elegant !!!