How to ask my grandmother to move out?

My grandmother has been living with my fiancé and I for a little under a year. It has been awful. Some examples:
-I am of mixed race and on and off over the past couple of months she has made some really inappropriate, racist comments about people of color.
-I have more than a few friends who are a part of the LGBTQ+ community and she constantly makes homophobic remarks and “jokes”.
-She constantly brings up my mother, who has been dead for almost 3 years, in an unflattering way.
-She was sneaking prescription painkillers (that she was given because of back surgery) but hid them from us and didn’t confess to abusing them until we found her overdosed and had to call an ambulance, which is a trigger for my fiancé that has had family members succumb to addiction issues.

Those are just the big ones. I care about her very much, but we are a very young couple and having her here is just too much. I’ve tried nicely confronting her and we have gotten into arguments about her behavior. I have crippling anxiety and she constantly throws me into panics, I can’t sleep at night because of her. I’ve tried telling her I don’t think her living here any longer is a good idea, she started looking for apartments but then I had a bad panic attack and she drove me to the ER, and now acts like I “owe her for saving my life” (my life was not in danger) and stopped looking. I’ve also talked to our local office of aging, but with the state she is in now, insurance won’t cover a “home” and we cannot afford to send her somewhere and neither can she. I just don’t know how to get her out of my house without offending her or ruining what little of a relationship we still have left.