The problem deducting that $85,000 for US taxes is that if you fly to Hawaii (which they do almost every week on the AJX contract), you're technically back in the U.S.
You have to be gone from the U.S. for 330 days out of the calendar year, INCLUDING returns temporarily for vacation or even a flight into Hawaii.
That means you can't, more than likely, use the deduction based on that rule alone.
Someone said they purchased a home in Thailand or somewhere similar and are using that as their "home" and still get to claim the $85,000 tax deduction, regardless of how much you return to the U.S. I have not checked with an accountant to see if this meets the IRS guidelines or not.
More than likely, you'll have to pay U.S. income taxes on almost all of it.