Need 1,500 Articles

Over the next 3 months, I will be needing around 1500 articles. I am creating 300 websites on various topics (I will give you keywords) and each have 4 pages of content. Each of the 300 websites also has an article that is made out of tokens so I can spin it using my software (example: "{great|good|deep|terrific}"). I expect at least 16 articles a week (4 websites). They need to be well written with little to no mistakes and they all need to pass copyscape. Each article needs to be 400-600 words long and SEO for the keyword given. You can feel free to write it by hand or just rewrite other content. I will pay you $200 upfront and then once the corresponding amount of articles is complete, I will pay you another $200 until I have all the articles done. Each week we are ahead of schedule I will add another $10. If you are interested, please post your bid and PM me a 200 word sample of your writing. The 200 word sample should be on the keyword: "Magic Tricks". I am looking for the best combination of price and quality. Ideally I would like 2-3 writers working on this project at a time but if I can only find 1 or if a team of writers steps up, I will go with them. Best of luck and hope to see some good writers step up for this big task!