Link Building Campaign - 50 Back Links

I need 50 backlinks from unique domains, for my site. The backlinks must be permanent and also doffollow. No blackhat or greyhat techniques should be used! The links should be well diversified, but they should be from pages with more than PR 2, prefferably from the homepages. The process should be spread over a span of more than 10 days. I will verify whether the links are dofollow, pr and also the usage of anchor text!! If you are not experienced in link building, please DO NOT BID! When bidding, please inform me how you are going to achieve this. *****This is like a test, and the successfull bidder will have additional projects lined up!