Like Chuck, hasty and others, I have physical problems including mobility issues. I bought three sets of aluminum steps to keep in my vehicles for those times I need them to get in and out of tractors, trucks etc. I use my cane to engage 4WD and a nylon strap to disengage. I have an extended "grabber" to pick things up off the floor etc; lots of options available. My tractors keep me active and my Rhino and Grizzly allow me to enjoy time in the woods.
For those of us with limitations, it can surely be frustrating to not be able to do what we once did as I too had to permanently park my Harley last year and can no longer safely run a chain saw, but I think most of us focus on the joys of what we can do without spending too much time on what we can't.
I don't know your situation, but I spent years recovering and would encourage anyone to hold off to see the level of recovery. Time may change your abilities as well as outlook.
If you can't drive a tractor, find something you can do and enjoy to stay active as I have found it much easier to stick with something you enjoy as opposed to exercise equipment though it definitely has its place.
Hope I haven't overstepped any bounds and wish you the best.
Larry