You should take care of your mom.
Even if it is putting her in a cheap home where all is taken care of for 20 or so a year.
Niggling about some word or whatever she did or did not do for you years ago is an excuse because you do not want to pay.
No one is perfect. Take responsibility. Pay even if you cannot stand to see her.
None of this "teach her a lesson" "your house, your rules" b.s.
Just pay for a home in a community where people can look out for her and others are around. They're surprisingly cheap.