OK, I'll add more info to assuage some concerns. :)

Mom's health isn't dire...yet. But she's visibly and physically weaker than she used to be for sure, and we (and ESPECIALLY she) would rather not emphasize that by going home once again and sitting in her house. She hates that as much as anyone. She's always liked to travel since she obtained the means to do so. Since she's flown out to Korea a few times (and formerly Dubai where we used to live), and since we've already done the Outer Banks, BRP, DC, NYC, and Orlando as fly/hotels and we're ALL a bit bored of it, we thought about the RV this time. Yes, the idea would be to fly to LV or a similar area and once we've spent a few days there, rent an RV and go see the desert... or something. Again, no good plan on this yet.

The thought of being in a park and her taking a nap whenever she wanted appealed to her quite a bit.

One thing I did not realize is you have to be upright in a seat in an RV if it's moving. Even in the back?

Oh! Also, not that anyone likes "wasting" money, but we understand this is not the most economical vacation idea. :)