10 articles on Investigation - Need Quick Turnaround

Ten articles needed on a specialized investigation topic. Each article must be SEO and keyword friendly, and unique. Proficiency in the english language and a natural flow of the articles is very important. There should not be any grammatical errors present as I will only accept quality articles that read as if they were not just thrown together or blatant sales pitches. I will also not accept any cut and paste compilations of existing articles in the niche as they are easily spotted. Articles must be informative, easy to read and enjoyable to read. I have the main keywords that I would like the articles to be written on. I would like a keyword density of 4% to 6%, however keywords should only be used where appropriate as the articles need to provide informative and interesting enough to drive traffic to the links. The article length should be between 400 - 700 words. These articles will not only be used for link building. I will exclusively own all copyrights to the articles. I am willing to pay $3.00 per articles. The timeline for the project is rather short. I would like the 10 articles to be completed within 2 days of project initiation. Payment will only be released upon completion of all 10 articles. In addition the articles will be checked to ensure there originality as naturally no recycled articles will be accepted. **no need to bid with social bookmarking jobs, link purchases, etc. - this is the only job I am looking for through this post**