dkelsawi--If you expect your maid to take GOOD care of your kids and want to feel safe leaving them with her, you should pay far more that 700 a month.  The maid's nationality will partly determine the price, as Filipinas charge more (as per agreement between Qatar and their nation), and their English-speaking abilities are in high demand--this puts you in competition with English-speaking expats.  Also, experienced maids who are already in Qatar generally cost more as they are in high demand.

The going rate for a good Filipina maid with substantial prior experience and good references from her former employer is between 2,000-2,500 a month.  The driver depends entirely if he lives with you and if you provide the car.  If lives with you, then about the same.  Contracting with a company cost considerably more.