I had bad knee pain for over 10 years. Had the shots that helped a little. Had knee replacement last year and now have no pain in that area. But, I still have arthritis in my feet. I use a mobility scooter when I have to walk long distances. We have a lift to put it in the car. As for the motorhome steps, install another hand hold bar helped in our old motorhome. Our new motorhome has a bar where I need it so no mods needed. Will have to have hip replacement to get rid of pain there. But, until they solve my arthritis problem, I will use the scooter. It allows me to walk some nature trails and see sights I would never walk to.