15 articles for UAW (1 original + 2 rewrites each)

I need 15 articles plus 2 rewrites each written for UAW (total 45 articles, of which 30 are rewrites). Each article must be completely original, 100% error-free, and in perfect American English. The 2 rewrites per article are simply different versions with the same number of paragraphs and generally the same meaning. Each article must have 400-450 words and 4-5 paragraphs. Each article rewrite must have the same number of paragraphs as the original article. Keyword density must be between 1.5 to 4% (you need to have a proper wordcount tool or estimate accurately). Each article and its 2 rewrites must be delivered in a .txt file, for a total of 15 .txt files. I have a strong preference for American, UK, Canadian, or perhaps Filipino writers due to style and syntax difference -- it is critical that the articles are in American English. I will provide the keyword phrases. The keywords are technical in nature and related to finance, statistics, and Excel. I expect you to do some basic research on each keyword phrase before writing the article so you know what you're writing about. It is critical that each article must sound competent to a knowledgeable reader and add real value. You must be technically oriented and willing to spend a bit of extra time writing good content. No garbage! I am not looking for the cheapest articles. I am looking for good quality at a reasonable cost. If I like your work, there will be a lot of future projects. Finally, I expect you to bid with a reasonable delivery time. If you can't deliver in 2 days for the project, don't bid for 2 days. Thanks.