Mary, someone needs to have some difficult conversations with mum. Clearly she will never be able to cope alone in her house, in fact even with all the support she is getting, she isn't really coping.
It is incredibly sad and unfair that mum has had a stroke when she had strived so hard for her career, but the time has come to work out what she NEEDS for the future.
A disability friendly property is surely at the top of this list?
However much she loves her current home, it's just not suitable any more.
Does mum have any health insurance that would give her ready access to counselling?
You should not become a victim of mum's stroke.
What would mum, pre stroke, be saying to you about having a life, a career, a family?