You haven't said how old they are, but a tad rickety is a clue. My parents house was too much for them, so they downsized. looking back, I am sure that they should have gone into a retirement village at that point. Instead they bought another house (even one with stairs, although they were a tad rickety). They have recently moved again. To another house. They had been in it for less than 6 months, and it looked like dad needed much more care. And it is too much for mum. So they are looking at what they should do. An aunt and uncle moved into a retirement village at about the time my parents moved the first time, and they are settled into the community, and have people around them who are friends. Even though one of them is starting to develop dementia, they are fine because they were there long before it started (it's very difficult for people with dementia not to go downhill rapidly when they are placed in a new environment).
As I'm in a different country to you, we have different services available. Here, you can get aged care assistance in the home of various sorts, and this enables people to stay in their own home for much longer. This has only recently become available. Before your people move, you/they should investigate the options available to see what is the best fit for them, and what will be the best fit in a few years time. My parents never even thought of moving to a retirement village the first time, but given that dad is getting forgetful, it would have been wise for him to have a solid memory for where he lives at this stage in his life.