We are often reminded to make a will & not to leave it until it is too late, but it's not only thing to think about.
My ex MIL is still having problems, she isn't settling in the home, refuses to leave her room & is constantly either in tears or throwing a temper tantrum.
Her house had precipitous steps at the back & front door that she found difficult to manage even when she was in her 60's.
She refused to have rails or a ramp fitted as 'they are for old people'.
She refused to consider a mobility scooter for the same reason.
She also refused, when she was in her eighties, to consider moving to somewhere more convenient, even if it was just to somewhere with a downstairs toilet, as 'she didn't want to live with old people'.
As her dementia worsened she would constantly phone her sons complaining that no one would visit her, one son claimed to be too busy, the other did what he could but has a disabled wife. Most of her grandsons were reluctant to visit as she frequently smeared faeces on the stairs as she misjudged the time it would take her to get upstairs to the bathroom.
One grandson & both her granddaughters did visit most weeks despite both having young children and it being an hour & a half drive each way.
If she has thought things through properly she could have moved to a location of her choice, instead of which the decision has been taken out of her hands & she is distraught.