The OP never said that he/she was going to sell it after the remodel.
The main issue with the older units is the hideous colors. We have had the dinette cushions recovered and tossed the ugly sofa for nice zero gravity recliners. What a difference little things make. The window valances are next. Maybe the flooring at some point.
The roof was professionally resealed a year ago as a precaution.
Tough to remodel a bath. Maybe update the sink and the toilet.
New mattress and replace the appliances as they fail.
This is a 2007 Jayco 345BHS we've had for 6 years now. Other than it's gigantic size we love it.
Welcome to the forum. Go Heels.