Switching to lighter kit as you get older, especially if you have health issues makes a lot of sense. Youngsters don't realise that the strain of heavy kit, let alone daily wear and tear, over the years, takes a toll on the body, no matter how strong or fit it is.
I've swopped out many things to lighter weight stuff, and I've found that a hammock , once you've found the right one, makes life so much easier, and gives a much better pain free night's sleep. A hammock is my preference nowadays, and I can have it up and ready much quicker and easier than a tent with just a few little tweeks to the basic set up, ( daisy chains for instance.)
If I'm on the floor, I have to have a good air bed. I've tried a few, most are too narrow for me, so I've got the treckology one, which packs very small, light, easy to blow up with the pump sack, (although I'm thinking a flex tail pump might be a nice idea) and comfortably wide.
No point in flogging yourself to death, there is nothing to prove anymore. Time to be kind to yourself, and your body, and lighten the load.
It doesn't have to cost hundreds, most of my stuff is second hand, and cost peanuts compared to the new stuff. Only the mat is new. Even my hammock set up is second hand.