Dubai has great restaurants, great shopping, and a great nightlife, and it all comes at a price, so if you want to live the high life 15,000AED won't go far.
BUT!! you are having education, utilities, and accommodation paid for, so that leaves transport (dirt cheap, both to buy and run a car), food (moderately expensive but I would say still cheaper that Europe by a long way), entertainment (could cost you anything, depending on your taste). You are basically in the same shoes financially as us lowly interloping ATC'ers and we manage to live well and save for our old age. I guess pilots live a fancier lifestyle than us luddites on terra firma, and as such need more than 15,000 AED a month.