19-20k USD/month for "5-7 years on the property" seems a tad optimistic. Basic in the low 40k's, housing allowance 16k, flight pay maybe another 7k. So roughly 65k AED, which is less than 18k USD. Maybe more if you fly insane hours.
But button push ignore does seem to be ignoring the tax-free implications, particularly for non-US citizens who don't have to report to the IRS...