With this kind of salary, you would be saving if any a max of 1000 QAR (270 USD) per month.

500 QAR for transportation v low (at least 1000-1500 QAR)
5000 house accomodation (u will be using all that money)
5500 basic - you will be spending at least 2000-4000 between u and ur wife as general expenses.

Hope this helps!