I don't think that I can do this myself, but I know that together with my boyfriend, we can bang this out for you. We are both born writers...his ability to listen to people, imitate them and write engaging dialogue is a gift! I'm more useful when it comes to ideas and the mechanics of writing. I propose that you send us an assignment - something that you could use as a chapter in the book - as we are only just starting out trying to sell our writing and don't have actual portfolios. I work full time but he is off right now taking care of his parents, so he should have time to write. He writes his own stuff for hours every day. I'm a little worried about the quality of the finished product in such a short time period, bit since you already have the outline of it, and can probably tweak things that we right to suit your vision, it should work!
if you are willing to take a chance on me, I'm willing to take a