Are you actually in Hawaii? Or where are you? I'm asking because I would like to provide you with contacts and resources for treatment options for people who have multiple problems in addition to an eating disorder. Because eating disorder is the primary and worst problem here.
So here's my take on this: Eating disorder is NOT the same animal as an addiction. Eating disorder people don't have a bottom other than death. The fact that she's living with you and wants to be around you is something you can leverage in your favor.
I'll PM you because most of what I have to say goes completely against everything I would say to someone whose kid was "only" an addict.