My Mum. 86 but a fit 86, ended up on her own 3.5 hrs away from myself last year and being disabled myself I couldn't get to her if I needed to in a crisis. She had a wonderful neighbour, BUT we couldn't just leave the neighbour to do everything for her, it wasn't her job, and Mum wouldn't ask anyway! So the difficult decision had to be made, so she sold her beautiful large 3 bed home and garden and has come to live 10 mins away from me. Problem was, her lovely home in Yorkshire was worth about half of the price of property in Wiltshire! We found a very nice over 55's estate in a pretty village - it's a ground floor 2 bed flat with a bit of patio overlooking beautiful gardens and pond, and no communal areas, so you can be as private as you like! She hasn't as yet found a special friend, but chats to all the fellas in the village it seems! Having a small dog helps her to get out and about. She does keep reminiscing, saying she is lonely, BUT she would have been lonely there too as she couldn't spend all her time with her neighbour .... only issue is the service charge is horrific! Just gone up to just over £5kpa. But it is a lovely environment, well maintained, she has her own front door and she feels very safe.
I used to be an estate manager at various sheltered housing developments - if you are considering it, do not go anywhere with a COMMUNAL LAUNDRY ROOM! That was the one thing I had to spend half of my day sorting out - arguments galore! My residents turned into a coven!