1) I have about a week's worth of it. I don't know if you plan on putting this into consideration though, the fact I'm knew doesn't tell you much about my writing. I know the lay of the land, I made this profile about three years ago and only came back to it now. I also have an eLance profile which I completed two jobs on successfully.
2) I've got plenty, over six years of it actually. My grammer is perfect (took the 2nd grade English exam, badge and everything. 93%) Here's my portfolio, check out the storage unit article. I got many praises for it.
3) I'd say it would set me back quite a few hours, I like to immerse myself into my work. 570$ (total price, I'd get 513$) should be good.
4) If it comes out to 100 pages, I'd say about twenty days. If it's closer to 150, thirty days. If you're really itching to get the book done, I could try speeding things up (for free).
5) I would never. I always treat my customers with the respect they deserve. I treat their works with more than respect, I worship them. If you hire me, I will do anything in my power to make you happy. It's your book, after all.
Hope you consider me even though my experience in internet based freelance writing is scarce. I actually published a short novella and am well on my way to published a full scale novel, so I have much experience where experience is due.