My first daughter, born many years ago, had many disabilities, so I know something about the exhaustion and frustration in trying to find answers. I also had a cousin with severe disabilities. Marriages are often destroyed (and were, in my aunt's case) because the mother neglects her husband or other children.
Now, many years later, I'm an advocate for disabled access, and I work together with many persons with disabilities, including a couple of people with very severe CP. The most successful people (and I think this also includes those without disabilities) are those who do not become too dependent on their parents. Before my daughter died, even though she was severely disabled, we worked long hours with a therapist teaching her to turn over by herself. It was worth it. Do everything possible to teach your daughter how to put herself to sleep, just as you would with a non-disabled child. Everything that she can do by herself, she should, even though it may require aids of various kinds.
Have you contacted United Cerebral Palsy? It's a great organization, and there are probably some support groups you can join, and you can certainly get some questions answered, I would think.
Good luck. You are very fortunate to have a daughter who "only" has CP and I wish both of you a long and productive life.
S. Toji (age 71)
Irvine