So, after some things I have gone through in the past year and from what I've read here, this is the conclusion I've reached. You should never move into the home of an elderly relative and you should never move that relative into your home, due to the "rights" of the elderly person who can still string 2 sentences together and sometimes have moments of clarity. I've observed if you are living under the same roof and the situation becomes horrible (and it usually does), you cannot move out or risk being charged with abandonment if the person is a fall hazard and has major health issues or cognitive disability.
You cannot force a person to move into assisted living if they are still able to advocate for themselves and express what they do and do not want. The person can literally be living as an invalid, laying in their own filth and you cannot force them out of their home if they say they want to stay. You can certainly contact APS, but there is even a limit to what they can make the person do.
Can you be forced to become a caregiver of a parent who has major health issues and who refuses to leave their home and has no money for AL or SNF? My own parents are aging, but thankfully still get around and drive (although they should not). I expect my mom to outlive my dad. She is a HOARDER so there is no way in heck that me or my sisters will EVER move into her house (I have not even spent the night there in years). So if she ever gets to the point that she is a fall hazard or wheelchair bound and does not want to have a sitter or go to assisted living, what happens?
We've discussed the plan of her living with each of us for 4 months at a time but there is no way to force her to do that. I'm a planner. I like to know all these things years in advance to be able to act on them instead of being shocked by events.