I've been doing "labor of love" in my life few times and when I admire people devoted to hobby, that doesn't make much economical sense.
Don't know how much experience you have, but assuming you have the skills, I would use the appliances from the camper and really build one from scratches. what will allow you to build it right, not "build to leak" like factory units are and you will get your favorite floor plan.
Ask any remodeling contractor, that fixing rotten frame always cost more, that building new one.
I like the floor plan of my single slide Fleetwood, but would love to have side door with less steps.
I researched the market and scratching the $60,000 new units off, such animal doesn't exist, so building my own, with the experience I have, I sure would avoid lot of poor designs you see on the market.
