Best1974: I am not aware of the salary slab of this position at Qatar Airways. But looking at the market, I would guess you may get an offer of 30K plus accommodation allowance which may be around 10-12K. If this position carries family status, then you may be getting some cash for your children's education. Since your children will be attending a school under western management, it is going to cost a bit.
This is the best guess I can make. Just wait and see what they offer and then you will be in a better position to weigh between what is on offer and what you already have in hand in your country.