I knew someone that was trapped in a similar situation with a adult daughter that was schizophrenic. She had suicide attempts and was in and out of the psychiatric hospital. Eventually the mom moved into her own small apartment and the daughter was forced to move into low income housing. The mentally ill daughter ended up doing better when she was forced to rise to the occasion. Studies have shown that this isn’t a unusual outcome. I have had to make hard choices with my drug addict son to protect myself. It might help to join a support group of parents with similar problems.