Some people survive with only less than 9K, with 2 or 3 kids, its depend on your life style and situation. If you have a better job now, I think you should better stay there.

Doha is a very expensive place. I am sure after some time you would like to have children, and there is no guarantee you would get big salary increment in a year or two.

So, 9K is though, but many people survive here with less than that coz they have no other choice except to live with it.