Ugh. I am so sorry to hear this. A close friend's daughter has an eating disorder and has for years. The strain is awful for both she and her mom. It's such a shame b/c she is an absolutely lovely girl. My friend has literally exhausted every penny she has to try for help, including double mortgage on her house that she is about to lose. And it continues. So so sad.
I am glad you are there for him. He will likely need a voice of reason very soon.
Hugs to all of you!