If anyone at human resources who hired you told you that you will be able  to financially be able to handle all that you mentioned, rest assured they are misleading you.  50,000 Qr /month after  realistic expenses and you will save nothing. Qatar sorry to say is extortionately expensive now. Leave the wife and child at home, live in a small hole here, and then you will be able to save something for yourself and family. GOOD LUCK.