Hello Bobby, I made the change to move to Qatar from Australia last year. Your salary is not sufficient to support your family let alone produce some savings. A western PM should earn on average QAR60K. If you wont be able to reach an agreement I suggest you apply for a reputable Contractor (Contractors well known in Australia do have contracts here) or Consultant company. The big ticket expenses here is the school and rent. A good 2 bed apartment in compound costs average QAR9-11K per month and school with British Curriculum (same as Australian curriculum) is about QAR30-40K per year. Your other expenses being food, clothes, car etc is cheap. Ashgal is a bit like the council back in Australia. They have many works online and in future, however dont know the job security or how reputable they are. Remember everthing is on a sponsorship scheme, you need approval to do anything even after you left the company (NOC is required if you wish to change companies).

At least get them to pay for schooling and you should scrape through.
Good Luck