QR 8000 is enough for a family of 3..although it should be exclusive of the accomodation allowance...i mean, your company should provide you the accomodation or if not an additional allowance for your place to stay....cause accomodation here is quite expensive....so if you have 8000 as salary, it should have accomodation allowance or a place for you to stay provided by your company...also, your lifestyle should be just average, not the super rich and famous lifestyle..you dont need that much money here,,,as long as you have a good place to stay, and you're not that choosy of your food,,,food here is very affordable...

Another thing is your transportation, if your company doesnt provide the service vehicle to drop you to office from your house, its better if they offer a interest free car loan...because if its not included, you will allot QR1000 for your transpo for a month...

Hope my answer makes sense to you...

have a nice day!!