I had the exact same model and year. Would have been hard to manage my late DH in that model. A lift for the entry door would make that part possible, but to have gotten him into the passengers seat would have been all but impossible for me. Mine had a chair with seat belt at the entry door, so he could have ridden in that.
I have seen handicapped rv's for sale, which might make it a lot easier for her to maneuver once inside. Bed and bathroom access would also have to be planned.
My hubby and I went from FL to Branson, MO and back, after Dr said he would never be able to travel again. Then, 2 years later, we went to TX and back.
Figure it out, plan ahead and do what you and your wife can do, for as long as possible. Good luck and God bless you both.