Well the cost of living here in Doha greatly depend upon rents here. If your rent is taken care by your company(then in most rentals water n electricity is taken care of) , then all you need monthly grocery ( it depend upon you) and fuel here is very cheap, u dont even need to think abt it you get a tank full in 30 QR to 40QR


Now if your kids are going school , then again it depend upon school you select, but in  an average school 300 QR is monthly fee, half for the second sibling, and i guess fourth is free.


Hope I have answered your query well