Question number 1.) Did granny at the time know the house was in going to the daughter? If yes, then wouldn’t that be intentional?
And from the looks of it all the belongings in the home will never be replaceable, even though they’re just things they were her dads things, a life that will never be replaced.
I think that would be the primary motivation behind my own investigation because 1. Not too much information is given but enough information was given to know that well if she doesn’t wanna sell she doesn’t have to and it wasn’t granny’s to sell.
We’re all aware how some people get when loved ones die that’s why I’m asking for that clarification and dependent on your answers would be dependent on the advice I would (if it were my daughter) give.

Nal but I watch a lot of court TV.
From my understanding, just her saying she’s going to give you money does not constitute any kind of a contract and she’s not under any legal obligation to give you anything even if she said she would.
If she said she would pay you for your help then that could be an enforceable contract but you would need some kind of proof like emails or text messages saying exactly how much for exactly what services rendered.
It sounds like this woman is very mentally ill. It’s understandable if you don’t want to spend your time taking care of some crazy lady and you should probably stop if it’s making you crazy too. Let her hire some help that’s trained to deal with these things. But I don’t think you can legally get any money out of this