Hi, you can get a room with your own bathroom for about 3k riyals just look around if you want that privacy. with the extra 3k, buy a car :) you'll probably have around <2k in monthly payments for your car depending on the model lets say <70k total car price. That way you wouldn't really worry about taking a cab and your accomodation's distance to aspire.

Like you I will be moving to qatar also just waiting for my visa.