that does seem to be a tough one...

if she wants him out she has to be willing to take the steps and live with the consequences. she is in fact breaking the rules by letting him live there and may be penalized for that.

standing firm on getting him out by moving all his stuff out the door may be the only way to do it. he will be out and then she wont be breaking the rule any more.

she could have him arrested if she has the cops come in and see the drug paraphernalia. and let them know he is blackmailing her as well. and the restraining ordere so he can come back,. plus she is a vulnerable population being mentally ill so that is a crime taking advantage of her. I don't know what agency you can report that to though.

I know this probably doesn't help much..just my thoughts.