This is certainly a concern. I'm early 50s now and have no medical issues or physical limitations (ok, aside from fatness). I'm pretty handy. I can fix what needs fixing. My tolerance for problems and delays is high. But it won't be long before I start falling apart and will want to be closer to medical resources for myself and service providers for my stuff.
I'm not looking for a forever home. I figure I might live in the middle of nowhere for a decade or so and then who knows. Maybe move closer to town and have a nice place to visit part of the year.
I know a couple that lived off grid and made it work for a long while. They only had to give it up in their early 80's after several decades on location. Not a bad way to be. The thing that did them in was failing health and they needed to be closer to medical centers.
I'm not looking for a forever home. I figure I might live in the middle of nowhere for a decade or so and then who knows. Maybe move closer to town and have a nice place to visit part of the year.