I live in a 1 beedroom apartment in the center of town, for QR3500, so there are cheaper places but you need to look well to find them

Some shopping malls have ad boards and many advertise flats villas and sharing accomodation for more afordable prices. Try Lulu hypermarket.
You just need to make sure your landord is trustworthy. Sometimes agencies are best, but are more expensive.

Beware of greedy private landloors and middlemen