NO!! it is not reasonable. What about the school fees??
The less school fees now in doha is approx. 15,000QR/year.

That means 5,000QR every 3 months.
I think u have to ask the company if they can handle also the school fees (even if they will pay only the 1/3 of it).

GOOD LUCK & welcom 2 the expencive live!!!