What others say they "can not" do is meaningless.
The only thing that is important is what YOU believe YOU can do!
We have owned truck campers, travel trailers, Class C motorhomes, Class A motorhomes, and spent nearly three years living in a 32 foot triple slide fifth wheel.
My OPINION is (based purely on MY experiences):
The last truck camper was to much work to load and unload, and had too many steps.
The Class C was nice, but too small, even though there are only two of us. And, I detested the Ford 460 engine!
The travel trailers were OK, but the Jeep Wagoneer had to have a WD hitch, which I also detested; The other tow vehicles were OK without the hitch, but hooking up was a nuisance.
The fifth wheel was great, but while we were living in it we were staying at one place for a minimum of 13 weeks. Backing the 5er was much easier (IMO) than backing the TTs. I nearly always did the hook-up and unhook by myself, no trouble. But then, I was "only" 60 at the time, not quite as overweight as now, and the COPD was just starting to make itself known.
I really like our current Class A.
OP, given the parameters you have stated, I honestly believe the fifth wheel toy hauler would be your best bet.
Remember, if you believe you CAN do it, you quite likely can.
If you believe it is impossible for you to do it, it is very probably true!
Good luck.
