Hello and welcome,
I too am so sorry to hear of all you are dealing with. I would say that moving to an area that is more affordable so you do not have to depend on her for anything would be the way to go. Sometimes you have to love someone from afar, it does not mean you love them any less, it simply means that a relationship with them may drag you down the rabbit hole with them.
Do all you can for your own mental health, and take good care of you. This is a place of great support, I hope you keep coming back!