H.W.
Hi LL,
I know your family enjoys cosleeping, but when I babysat or nannied, I preferred the children to fall asleep where they were meant to sleep. I might have been next to them, reading a book, but I didn't like transferring kids from one place to the next. Your request isn't usual, but not 'weird' weird.
If your children cannot sleep without a human body present, this is a good time to get that started. (Said from a mom who did the 'can't sleep without you' dance with her son until he was about 4. And he did fine. Not getting on your case, but it is time--your social life with your husband depends on it.
We pay our sitters $10 an hour as an average where we live. What others in your area pay will depend on cost-of-living, etc. I found that the care we get for the less expensive babysitters in our area was a bit lacking. A good sitter might charge more, but they're worth it.