Article rewrites of health-related topics - long term

PROJECT DESCRIPTION: I have several hundred articles 400-600 words in length on health issues. Each article will need to be rewritten, but keeping in mind the keywords for which they’ve been optimized, which will be specified at the time the project is awarded. For now we will be bidding on a “test run” on the first 10 as described below. PROJECT DELIVERABLES: These articles have been written to be original, to read well, and to be content-rich; I’d like to keep them that way. I’m not looking for articles thrown together randomly to fool the search engines; the reader should still finish reading the article feeling informed about the topic. CONDITIONS: Buyer will retain all rights and ownership. Minimal or no research is needed, just rephrase/rearrange the articles to avoid duplicate content problems while adhering to all copyright laws. Articles will be verified / checked with dupe content checking tools. LANGUAGE AND CONSTRUCTION: Articles must be written in English with grammar and sentence structure consistent with that found in a journal or magazine. If English is not your native language, you must be 100% certain that you can provide this level of quality. I do make minor corrections myself where appropriate, though I have no interest in rewriting content that has been poorly written, so please make sure that you can provide the required quality level. PROCESS: While the entire project consists of 50 articles, you are bidding only on the first 10 . If product is acceptable, winning bidder will receive priority consideration for additional articles that are planned over the next 6-12 months. I am looking for someone reliable to work with over time on future projects. YOUR BID: Please submit a sample with your bid that is representative of your work. The articles you rewrite will be expected to match this quality. This should make revisions unnecessary, but I will ask for them if appropriate. In your bid, please describe the amount of time to finish the first 10 articles. I would like the first 10 in 2 batches of 5 each.