For the first time I am learning about such a salary package!
HRA is more than total of Basic+other allowances!
Lucky you! Thanks to Qatar economy!

The salary u stated is enough to survive and earn. But it depends on you, ambitions, goals etc. I would suggest you to check the accomodation company is offering you as fist step. If it is enough for you & your family go for it. Incase it is of inferior nature, go for the 8500 per month allowance. You can easly find out a 2 b/r house for 6000-7000 QR per month.

I guess your's is a managerial post. Why not demand a better package?
Good luck to you!