A couple years ago I started converting my enclosed trailer into a multi-use trailer. The goal for this rig was to have a combination cargo carrier and short term camping trailer, and be able to drive it into a field hauling decoys for duck/goose hunting. Still have a ways to go, but now the major mechanical stuff is done, which was out of my league, and that clears the way for me to start the interior modifications. This is a 7x16 trailer with a 2 ft v-nose, and has an interior height of 7' 3". Now has 7000 lb straight axles (stock was 3500), 5600 lb springs, 8 lug 16" wheels with load range E tires, load leveling hitch, electric tongue jack, dual 6 volt batteries in a lockable box (batteries charge when hooked to shore power or to the tow vehicle), sliding window in the walk door, a sliding window on each wall, 30 amp RV hook up with electrical panel and 12 volt converter, overhead vent with 3 speed Fantastic fan, 1 1/2" thick floor, 3/4" plywood walls 1/4" plywood ceiling, fully insulated walls and ceiling with rigid foam board, folding entry steps, folding hand rail, and 4 interior electrical outlets. Also now has 18" of ground clearance for the lower deck. And yes, I need to build the cabinet to properly mount the electrical panel. With this concept I will also need to be able to remove camping fixtures such as beds, chairs, etc when I want to haul things which requires a bit more pre-planning. The bigger axles are not so I can put a zillion ponds inside, but to strengthen the suspension, add some ground clearance, and get the bigger heavy duty tires. Not there yet, but getting close.