I would be able to deliver 2000k per day on just about any topic you gave me. I have written non-fiction ebooks on Meditation, Motivation, and a DBT Self-study Course.
However, I would not be able to do so at the rate you suggested because that would be 1.87 per 500 words. I live in the United States and so that would not be enough money for me.
I am interested in hearing what sort of topics you need people to write about. If you need people to write fiction, I also write fiction. In fact, I started out as a fiction writer.
I am easy to work with, willing to make any changes you might need, although everyone in the past has been satisfied with my work, and willing to provide you with a sample.