Cost of a decent one-bed apartment in a Western compound/tower with good facilities (pool, gym, shop etc) is likely to be between QR 8,000 to QR 10,000 per month. If you're gonna share I would expect to pay about QR 3,500. You can of course get a lot cheaper places, it depends on how you want to live while you're here. Bear in mind that if you're planning on living alone you will have to pay a month's bond and probably half a month's rent as commission on top of the first month's rent.

Renting a modest car (I had a Honda Civic when I first came) cost me QR2000 a month. A 4x4 will be more like QR3,500/4,000 a month. You can buy old Jeep Cherokees for about QR20,000 but there isn't really such a thing as a cheap second hand car over here. Cheapest thing to do is to find a freelance driver who you like (they stand outside the malls), get his number and use him as a private driver.

Petrol is so cheap it's not worth thinking about. Groceries will cost you about the same as they did in Oz. Beer is QR40 a pint in the hotels or about QR180 for a 24-pack from the booze shop.

Ideally you want to have accommodation included in your package as this will be your major expense. If it's not included you probably need an absolute minimum of QR15,000 per month. If it is included you're going to want at least QR10,000 to have a life and send a bit home. Ideally you want double that figure though.

Also, make sure private medical insurance is included with the package (it's usually in there as standard).

Good luck.