However, after considering the cost of a trailer, and everything I want to ad, the price started to grow. And then I would still have a difficult time getting everything I want on such a small trailer, and keep it comfortable under the weight limit, fully loaded.
Then it dawned on me. I totally forgot I have a late model 5x10 trailer. It's very nicely built. It has a 3500lb axle and uses a standard 5x5 Chevy truck pattern wheel and stock sized tire. It's structurally excellent. Just needs a fresh paint job and new deck planks. However, I still do occasionally use it as a utility trailer.
So, how difficult do you think it would be to make, basically, a 5x10 box with a 5.5-6 foot roof that simply slides into the trailer, like a truck bed unit? Consider a 5x10 camper unit with a bed, 110V and 12V power built in, perhaps a small AC unit (this is Louisiana, after all) and other amenities, that is built in a light weight fashion, then put it on, say, 8 heavy duty casters that are recessed into the floor frame on either side. When you need to use the trailer, like a trailer, simply have a purpose built stand for the cabin (this would be the easiest part) that you back up to and roll the cabin off. When you want to use it, simply roll it back on. Devise a few simple ways to safely secure it to the trailer, and voila, a versatile, easy to use, camper. It's fully self contained and leaves nothing behind on the trailer.
I know it's really utilitarian sounding and doesn't have the elegance of a TD, but I think done nicely, it wouldn't be anything to scoff at.
Thoughts? Feel free to point out anything I may be forgetting.
BTW, here is an actual picture of my trailer (just 3 years old, LOL).
