Micro Niche Project - Rank my sites

I'm going to cut this short, I'm in the process of creating 20-30 micro niche websites (affiliate sites). Each website's domain name contains the keyword(s) I would like to rank for in google, bing, yahoo, etc. What I would like is these sites to all rank well for the keywords I have chosen. My goal is to get each website if not at the top, at least top 3-5 spots on google for that search term. Since each domain name is optimized, I feel it should be a little easier. I'm not going to necessarily choose the cheapest bidder, but the one who can show me and prove they can get the job done at a reasonable rate. No upfront payments, only after work is completed to my 100% satisfaction will you be paid. This will be a long term position, as I need to consistently keep my websites ranking well each and every month. Please, prove to me you are worthy. Thanks