Unfortunately I can offer some perspective, my brother now lives a semi normal life in a hostel that I fund, but only after the state finally stepped in and took responsibility for him. He's now on what she needs a medical order where the only way he can live in the community is under a supervised medical order where they have to take anti psychotic medication. This medication as crude as it might sounds turns off the noise in their heads that we all see them battling with when we walk past people talking to themselves etc, there are so many people who would benefit from type of order but unfortunately in a complex world it takes a long time to get to this point and most usually die prior from drug overdose suicide or other illness related to their mental illness.
Hopefully she can get the right help.
Yes, this is where our mental health/addiction system fails miserably. It's amazing what medical/social worker system does now allowing addicts to choose to keep taking drugs under some lunatic ideology of honoring patient choice or dignity. They end up with the compassion of the streets and their own illness. The solutions are all there out in the open, recommended by true MH and addiction professionals and obvious, but homeless and other phony money grubbing "advocates" block the obvious remedies.
Dr. Drew talks a lot about this.
Heck, Hanky probably has a lot to say on this issue also as he's probably familiar with the system in his state due to his wife. Everyone inside the system with a brain knows what needs to happen and it isn't the "more money" they're always saying is the problem.
