Are the benefits mentioned over and above the USD$8000/month? Petrol here is probably nearly the cheapest in the GCC but if you rent or buy a car - a Corolla will set you back about QAR2000/month to rent and to buy a larger vehicle the payments would probably be slightly more depending on your down payment.

If you're looking for a 3 or 4 bed villa in a good compound with good management and facilities - could cost upwards of 12 - 15k month.