I believe my cousin who has schizophrenia is considered gravely disabled. He was diagnosed sometime in his 20s and he's now in his 60s. When he was diagnosed he was violent, actually. I don't know the full story, but from what I understand is that he became very violent at work and possibly hurt some one. Because of it, he has never worked a full time job since then. Instead, him and my uncle used to do odd jobs together as a team, like passing out flyers. They always had some little jobs they did together.
Now that my uncle is passed on and my aunt is rapidly declining, everyone is always worried what will happen to him. He is on disability, but we also know he's got a reverse mortgage on his dad's house.

(He told us that, so... that's not good.) I personally don't believ he could have worked or something. In my lifetime he's always been an even keeled, smart, nice guy. They used to babysit me as a kid and he's always been really a kind person to me. He is quiet and definately has a flat affect, but otherwise I think he could have done something.