Adria have this Laura’s do a few others. We seriously considered it. One thing that put me off was not having a bedside table. I know it sounds pathetic but like you I have health issues so being comfortable in bed for a couple of hours in the afternoon is very appealing.
Spend some time looking at how much space there really is in the kitchen and bathroom.
We Hired a motor home and found it very tight on space. Also the toilet was too high and the
space to narrow.
Then of course it’s hard to go to places with a motor home after years of parking up your caravan that will take some adjustment. Have you considered looking into ways if making caravan hitching and moving easier? It might be better to stay with what you know , but let technology help you.
Good Luck