If you are planning to bring your family in the long run, you will need to rent an apartment which would cost you around QR 4500 per month. Your other expenses which includes food will be around 3000 with your family here. The rest is all in your pocket. Your savings also depends on your lifestyle. You can now compare your current savings with what you will be making in Qatar and decide on whether you should accept the offer or not. I have stated the above approximate expenses thinking that you are an Asian. For westerners, the above cost of living may not hold true.