I only had 30 or so for my daughter, up until she was 2. I had to wash every other day or I was in serious trouble. I also used disposables at night.
I would caution against using bleach. Kids are really sensitive to that kind of stuff. When washing, use the bare minimum.
Some links:
http://www.cutofcloth.com/article_vinegar.asp
http://www.diaperpin.com/howto.asp
Diaperpin also has reviews of the MANY kinds of cloth diapers you can get.
She's almost 2 and half, and because (I think) her underpants feel like diapers she pees in them. She's not uncomfortable in wet pants yet, but she does go on the potty if she's NOT in anything. Go figure.