The thoroughness of the kits will matter a lot.

My dad worked in a travel trailer factory in Elkhart In when he was young. It is different from working in a building in a couple of ways.....first you cannot use a level because the trailer is on wheels instead of a foundation. I suspect this is easily solved by leveling the chassis to start with but apparently they did not do it that way where dad worked. Second it was back when they were using plywood for the inside. Every piece had to fit together perfectly because there was no drywall mud and tape to cover mistakes.

If the kits are good I imagine it might be a pretty good gig if you are good at doing puzzles.

Having a personal relationship with your business partner might make it tricky though.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.