It depends solely on your lifestyle. People are having a good life here in much less than that. But as you said you would be eating out many times with 6 family members, that increase the cost of living significantly. For maid, the average here would be 1500 QAR per month. Water/Electricity is cheap here. Cable tv/ internet would be around 300 per month. If eating out about once a week and eat at home other days, you can save few thousands.