If you can find a rig all set up that works for you it might be the way to go.
9k for our lift installed and other mods that I did.
We installed a super arm in our MH
Others also make seated and standing lifts.
Watch bedroom layout to make sure DW can access her side easily.
Roomy shower and toilet area.
Easy access to passenger seat. (I ended up moving my DW's seat back a foot.)
Most units can accommodate a walker easy enough.
But think think about the long view, will it work later too.
They make raised toilets and raised toilet seats work.
Attaching grab rails to something "solid" can be a challenge.
If your handy it's amazing what you can do.
This couple has a neat rig and she has an excellent blog about RV'ng
with special needs.
........Rolling in a RV - Wheelchair Traveling......
More and more resources are coming along to help those of us who
are camping w/ handicaps.
Any questions, IRV2 is the place to get your answers.