Several of my friends in my age went "sensibly" looking for bungalows against the time when we might be less mobile with or without a specific medical condition.. Alll of us have found that came down to it, there was very little choice between a rabbit hutch and a substantial,, i.e. expensive property, on they were on estates too far away to walk to the shops.. As soon as I got my dx. I set about having an extension (undeerfloor heating) built to my semi::- decent sized bedroom ( now an office), wet room and utility room.alll with wide doorways,,, and a small SE facing sunroom. I always said I would want more space once I retired and II love it. It cost an arm and a leg (incredibly deep foundations were required because of clay and surrounding trees) so its not necessarily an investment but I've no intention of selling and count myself very lucky to have been able to afford it and stay in my nice village location.
By the way most occupational therapist say going up and down stairs is good exercise whilst you can manage it but PWP's have a balance issue.. I'm sitting here nursing sore ribs and a huge bruise/lump on my thigh having bounced down the stairs last Thursday and the bath is getting bit difficult so its better to make a decision sooner than later. You don't want to be coping with a big change when you are already having difficulties