Hi Sir,
It totally depends what life style you want to follow and what living standard you want to afford.

In Doha i goes by location one bedroom you may get from 8000-14000 rials in prime area.
And if you search in out skirts it will be from 5000 -8000. Transportation is another expense here and it cost a good amount of money it may go from 800 to 1500 rial or more depending you job require how much travelling. Rest is for food one time meal is costing for 15 to 30 rials depends where you eat.Some company cover cost of transportation and accommodation check in your case.