Only your family can judge health issues and what type of RV works best. But a used class C or small class A is a better choice. They are shorter in length and height than any 35ft fiver and tow vehicle. And easier to back into a tight NF campsite since the back of the RV is always visible in the mirrors. Also, for someone that is not doing a lot of RVing, fewer tasks to deal with and no chance of dropping the fiver. Even if a toad is part of the total package, disconnecting the toad is separated from the task of backing into a site.
New RVs have more problems than a used one where most of the bugs have already been worked out by the previous owner. And getting warranty work on a new rig can be very trying for anyone, dealer runaround, waiting for parts from the factory, etc.
