If that kind of work is fun and interesting for you there is unlimited possibilities.Yes it is a lot of work, but that could vary depending on how big of project you take on. For me it was rewarding. I bought a 16' travel trailer headed for salvage. I wanted the frame, windows, stove, holding tanks ect. I demoed the trailer to the frame. Rebuilt it with an all aluminum floor, aluminum wall and roof framing. I covered the roof, interior and exterior walls with coil aluminum. Advantages, I added a foot in length so we have 2 single beds, one on each wall with a walk space between. much easier to make the beds and move mattresses. It also created a lot of accessible storage underneath the beds. I was able to rewire and re-plumb in and organized manner which created easy access to things like the water pump, hot water heater, drain traps etc. Everything is behind a door, no tearing out cabinets or panels to get to anything. I also, again, created more storage space. We actually gained so much storage space we eliminated all the upper cabinets except above the sink. For a 17' X 7' living area it does not feel all closed in like most TT. I also increased the ceiling height by 2''. No more ducking under the ceiling lights or AC. Batteries are also now enclosed. Plus I dropped 300lbs. off the trailer weight. I don't know what your idea of camping is. We go lite and simple but very comfortable. What we consider a lot of storage may not be so for others. The other big advantage is the trailer is totally sealed from the out side. All access boxes for electric, water and penetrations through the floor are water tight. I also now have a trailer that does not leak, I tested it with a 1800psi. pressure washer before finishing the inside walls. It was worth it and I would do it again!
Hope this is an inspiration and not a turn off. Tom