50 X 500 word articles (mental health) - NATIVE U.S. Speaker

I am looking for a native U.S. writer to create 50 X 500 word, SEO-optimized articles in the mental health space. Total compensation will be $300. All articles must be unique and fully pass copyscape. Please include article samples with your proposal. Also please specify how much time you will need to create 50 articles - I am looking to have these done within 2 weeks if possible. Thank you.