Welcome TammyR!!
It seems as though she may never be able to live at home. Listen to the professionals. If they are saying that - it is likely true. Their goal if for reunification.
I hope the adoption agency is paying for the Residential Treatment Facility (RTF).
Reactive Attachment Disorder (RAD) is a tough diagnosis from what I have read. The books mentioned above are usually helpful to parents that find us and have children with Reactive Attachment Disorder (RAD).
Is she on medication?