Hello,
Please excuse my intrusion, I'm not really a US resident, but I don't get it. Why do you want the writer to be available in the US when this job has nothing to do with the real world. I mean it's a virtual thing so the location shouldn't matter. I'm not trying to dictate or educate you here, but simply writing down what I feel about this post. I can write better than most natives and I'm proud enough to speak for my own nationality, yes I'm a Pakistani. I've studied psychology and those who know more languages have more cognitive consciousness; which means even logically, I can prove that I write better than the natives. Sorry to flaunt it so directly, but this had to be done. I have to erase this whole concept, this belief everyone has. Nationalities have nothing to do with writing - don't mind me talking so much off the topic please, just think about it rationally.
Cheryl.