If your daughter is not ready, why discharge? Can't you meet with social worker

facility, explain your concerns, along with your financial situation and see if they will allow her to stay? I think they would more than likely be able to write it off as an operating loss if you are no longer able to afford and for them to show good faith since you've paid up until now.
The facility should also be able to guide you into the next step. Do you have a Care Manager on the East Coast? If so, contact them if not look into getting one. I live on the East Coast and our d is in a RTC which is covered by our state. I'm not sure if NY has similar and if it matter because your d is 18.
DBT is very effective for BPD however it takes lots of time and practice. Often times more than a year. Educate yourself as much as you can there are lots of lessons on this site and good advice from parents who can relate.