It's right in the middle (East/West) of the United Arab Emiraes - roughly half-way from Abu Dhabi on the Gulf coast and Fujeirah on the Indian Ocean coast. Fairly close to the Southern border of The Emirates with Oman.
Al Ain is roughly the Arabic for "The Water Hole" and that's about its only original claim to fame - probably an oasis where caravans stopped going across the country. I believe it is now a thriving city with Hilton hotel etc.
As for more info, and salaries/costs, I hope someone else out there can help as it's not where I live.
Good Luck
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---- "Per Ardua ad Mixas" ----
(Through hardship to the bars)