Hey! I don't plan to get my money back in labor but at least in materials invested.
I purchased the airstream for $7,600.00. I lived in it for over a year in original condition. So you can imaging I had a lot of time to think about a floor plan.
I put an additional $10-$13K into remodel. I would hope I could manage to resell for $18-$20k. The exterior still needs a lot of work.
I kicked off my project by taking 2 weeks off of work and put in 12-14 hours days. Got a lot of the prep work done. After that my dad and I would work on it on the weekends from July to October 2015. The trailer was in great original shape so it didn't require major repairs of the main systems. If I were to estimate man hours we both contributed about 250-300hrs.
Thanks for the questions!