Sleepy,
I am sorry to tell you but you have been offered a bad deal.
It is not worth it the swap, trust me on this one!
Considering what you are making back home, your seniority and the huge sacrifice one makes to live in this kind of place, you should aim for a package of 50K to 60K QAR / month.
Anything less than that, you are being misled.

Honestly, I wouldn't leave Calgary with the conditions you have there, to come to a place like this (it's not exactly what we think it is. The worse is unveiled once we get here) for the tiny package you've been offered.