like I already suggested, use this 50lac as deposit and get a house loan from an islamic bank(according to ulema it is halal, till you make a delayed payment).
don't use agent etc...do it yourself. find a property that is under priced. 5-7% is excellent rent. pakistan gives avg of around 3-5% just to give you an idea.
bank loans in uae are cheaper than 5-7% per annum, so you'll be making good money even on borrowed money. If I'm not wrong, banking regulations are still not as strict in uae as they are in pakistan, so you could get a decent amount of money from the bank.