Housing expenses largely depends on the location which you prefer. A 1 bedroom flat at the Pearl around (QR 10,000.00), you can find cheaper ones in different areas. Check with accommodation section in this site.

If you will be offered a family status, medical will be provided by the company. Anyhow, before they will give your the figures, discuss medical, etc. issues with them to be enlightened and bargain for your total package.

Good Luck.