Yikes. There is a lot of strength shown in doing whatever it takes. However, I think you are right now, your D needs to live her life. It is the only one she will get.
Maybe take her to a TEDx talk in your area. Perhaps listening to very motivated people for an entire day will snap her out of her funk.
Me: 32 W: 29 T:8 M: 6 D4 S2 M - 8/2008 W is not happy - 1/2014 W wants D - 9/2014 W moved out - 11/2014 D filed - 1/23/2015 D'ed - 2/25/2015 Gave X the Letter - 11/10/2015