I bought a 1990 229L model about 10 months ago. Had 3 leaks around windows, wallpaper falling off,etc. Have spent 8 months working and piddling with it. Enjoyed every minute. Have it completely redone now and would not sell at any price. My window leaks were solved with caulking the outside of the windows and using a wood putty ( dry and mix with water) to patch small areas inside. Redid all the wallpaper, replaced bathtub, bath sink and toilet among other things. Most of it is simple BUT I do have lots of tools and a tablesaw I used to make new moldings, etc.
Luckily, I bought a solid camper with good rubber and all mechanical things were working. No roof leaks but I bought the white roof coating from Home Depot and had enough for 3 coats for added protection. Cost $ 75. Wife and I made a lot of other changes til we got it like we like it. Then went on a great 12 day trip to the coast in Texas.
Test holding tanks by filling them up and so on. Can be lots of fun if you have the time and tools. I gave $3100. cash for mine.