My cousin's husband was bi-polar. I say "was" because he had a heart attack and died in February.
He was so talented in many areas, music, art, business, many of the building trades, but a total failure in his life, other than his wife and kids. His illness kept him from succeeding at anything. He never took meds, so everyone was at the mercy of his moods. Of course he drank a lot, but was so lovable when he did, that we all forgave him. He wasn't a mean, sloppy drunk, just more normal. Many people with this disorder self medicate by drinking. We all loved him so much, and wish he was still with us. By the way, his disorder got less and less as he got older. He was 71 when he died and normal most of the time. Not sure if that means anything but it was true for him.
I feel for you with your daughter. I'm happy she has you to love her and take care of her.