OK, lets see, 6 bedrooms about QR15,000 .......... would you prefer that to be a straw or wooden villa???

Seriously, a tall order now a days, but I think for a relative bargain like this, you may need to deal direct with the landlords and cut out the middle men, agents etc.
Also, expect more cons than pros associated with a property for this price. Even a decent 4 bedroom would cost more than this.

Good luck