Avetta,
I'm an American from Arabic origin; I recently got a Job offer From Qatar gas and did take it. I did do my home work regarding salaries and benefits so I might be able to help you on what is reasonable and what is not, the only thing that differ for American is that you actually have to pay taxes to the US, thought salaries here are tax free.
A general rule, if you are offered what you are making right now in the US with housing and other benefits to the side, you should be fine.
Regards
I