I have thought about converting a cargo trailer for many years. I have another project, a 1957 356 Speedster replica, that I am building and thought that it would be nice to have a toy hauler that could carry my car and double as a camper. My neighbor made me a great deal on this trailer, so I put the Speedster on hold and began a conversion on the spur of the moment! My wife and kids accuse me of always having too many projects and I think they may be right.

The two things that I started with from the previous owner was the AC and the toilet. They were in acceptable locations and I developed plans around them. I chose to not have an inside shower, only an outside shower and use the facilities at the campgrounds. I will have a queen size bed across the back of the trailer that will be mounted on vertical e-track. This will allow me to raise the bed to the ceiling and my Speedster will go in underneath. I will also have a futon along one wall for seating and an additional bed, it will be left in the garage when hauling the car. I have 13 1/2 feet from the back doors to the bathroom wall, barely enough to push the car in and tie it down. I will build/buy ramps for the back since it is barn door style. No cooking inside, only a microwave which will be above the AC and a mini fridge. I will need 120V to power the appliances. I have installed a convertor and will also have 12v available for lights, etc. We intend it use it more for a weekend getaway cabin, than we do for hauling the car.
I will follow-up with pictures of my current progress even though I'm not really good at keeping track with pictures, but I do have some of the highlights.
James