Hi Schatzmum,
I don't have an answer to your question, but just wanted to say how fortunate it is that your D is coming to terms with her diagnosis, and is trying to learn everything she can about it. That is such a big thing, I felt the need to comment.

And she has someone willing to stand by her and help, another silver lining. Also, you're cheering for her and trying to learn about RTCs in her area. How family responds makes such a big difference.
Would your D be willing to relocate to an RTC that was not close by? Maybe something closer to you and your family? Or perhaps a treatment center that you (and her boyfriend) would be willing to visit when appropriate?