Hello!

Accomodation is generally a major expense in Qatar, which takes a bigger part of the salary. As you have said, if that is taken care of, and also the food, and considering you do not make a baseless decision of staying in the Doha city, and if you have no other fancies(like partying, drinks etc.),

then...

Sincerely, you should be able to save atleast QR.3000/-

ALL THE BEST!!