To live a close to decent life in Qatar for a male, his wife and a kid you would need atleast Qrs.20,000/-

A two bedroom flat Qr.7,000/- to Qr.9,000/-
Weekly food allowance (Grocery) Qrs 500/-
Eat out once a week Qrs.300/- for two
Vehicle allowance for a month Qrs.2,000/-
Clothes, Misc. Etc per month Qrs.1,500/-
Save for retirement/rainy-day Qrs.3,000/- per month