Im so sorry.
We’ve been through something very similar.
Helped her get housing and it was a huge mistake.
Our daughter was able to get social security disability. Her mental illness is so extreme, there is no way she is employable.
Perhaps disability is something appropriate for your daughter. Hard to say.
We couldn’t possibly allow her to live with us.
We have found the Families Anonymous meetings helpful. We like their literature.
There are various 12 step programs that offer strong support especially with reference to how to set up and keep boundaries.