Anyone here have a handicap assist system installed?

My wife had an accident and then back surgery but that isn't keeping her from wanting to continue going out camping, now that she's mobile again.

Her main problem is that she has trouble lifting and aligning her feet to go up and down our trailer steps. At her current rate of improvement, it will be quite some time yet before she can do stairs really well and with confidence.

I want to help her enjoy things as much as I do, and to not feel restricted. So here's my question.

We've seen some 'elevator' systems online, and were wondering if anyone here has one installed, and how you like it. She particularly liked one that looks like a liftgate for a truck. It has a handle and a secure, flat place for her to stand to enter and exit, so next to no barrier to stepping on and off.

Our trailer frame and wall sructure can take the mount OK, (it's one of those stout Northwood units) but I'd sure like some advice from someone who has one of these elevators installed; such as how much to expect to pay for an installed cost, what kind of maintenance it requires, and has it been reliable for you.

Thanks to all who can help.