Hey NewPlanet, how are you doing?
I'm English, and degree educated. I'd love to write for you long-term.
I charge 3.5p per word, but as you're working in USD - that works out at about $27.55 per 500 words.
This includes research, proof reading, and any revisions, should you require them.
I'll send you my samples right away and look forward to hearing from you soon.