A two bed room apartment will not cost less than 8000 QR per month.

A decent school's term fee is around 5000 per term.

Petrol and cars are cheap here.

Don't know about the salary structure may be PM can help you.

You have mentioned housing and children education alllowance as per policies. So you might not be able to change the allocated allowance for the post/grade you are getting job. So the only negotation left will be the basic salary.

Good luck.