It seems enough. But please do not forget at least you need to get paid for accomadation. Check the flats & house rents from the site. You need a 3 bedroom flat or villa. Prices are begins from 8000QR. And the school prices are quite higher than England. Or you can rent a flat from Ezdan they make 18 months contracts and you pay only pay for 12 months and get 6 months free.