32 expert articles SE optimized

hello, i need 32 high quality expert articles about link building. The writer need to have previous experience in link building and SEO. The articles must be of high quality, real high quality, expert writer for expert articles so the articles can be a reference in the field. My budget for this project is $200 or less. The article will have to be 500+ words each. I'll provide a list of keywords to be used for each article. you will insert the right keyword density and will make sure that articles are wrote for readers and NOT search engines. Thanks.