Experience has taught me to begin with the trailer .... get all that stuff worked out in advance , while you can get to it ....EASILY ...this one has smaller wheels than the others 14"... simple mod will allow the building of an 8'LongX 4"highX 54" wide TD/box...
Some of the changes from the last one are: a rear door instead of a hatch (no fancy or expensive hinges, bending wood ,ribs ... etc.) An overhang over the rear door will provide a "porch " area and eliminate the need for any waterproofing of the rear door area, and provide a nice place to stand in a quick shower... rear overhang will have a roll out awning , and places to hang lanterns...(hahahah)
The front will be rounded with a generous curve/radius to streamline the TD whilst' towing down the highway burning expensive gas...
The inside will have a removeable shelf in the rear , some side shelves to store essentials , a pegboard wall area to hang the "handy
" stuff , and a cargo net in the front ...AC , of course , and GFI extension cord as the electrical system ... TV/Radio /CD combo will entertain ...
Floorspace will be long(almost 8 feet ) for us tall guys plus room for the ice chest ... Perfect for a weekend ride to a friendly place , and a bit of camping ...
I design and fly Model planes , and this would be perfect for attending their Fly-ins... hence it will be painted on the outside like a nose of a Jetliner... Just for FUN !!!

I'll post pics of the progress..This one should go pretty quick , and cheaply , due to experience and alotta' leftovers.....