You're doing a great job! I'm impressed. I just bought my first PUP and she needs a lot of work too. I plan on stripping down the roof this weekend and rebuilding it the following weekend. Thankfully I have no floor rot. Mine is a 10' camper so I plan on pulling out the sink and cabinets to give me more space. Somehow I will need to figure out how to add support to the walls since I am pulling the cabinets. I'm sure this website will have advice. Keep up the great work and definitely keep us posted on your progress.