If you are single, you can get a one or two bed furnished apartment for QR6K (this is manageable).Brand new ones would cost upto QR10K including electricity and water.

Food typically is around QR600-800 per person per month.
Telephone and Internet allow QR350. Transport if you use a pool taxi service will cost you around QR800-QR1000 per month for going to work and back, shopping and minor outings.

If you do not go out to drink and socialize frequently, you will be able to live with QR7.5K (Average) to QR8K. You can save QR 7K per month. However, if you want to live like a senior manager with a good quality of life, you may be on borderline.

Best of Luck

Rsai