geee...QR20K is big amount...the others opinion is right..it depends on how or what kind of lifestyle you wanted here in QATAR. You can rent a room for atleast QR3000 above/ month that is decent enough since you are single. Car you can rent from QR1600 ~ QR3000/ month+ petrol. Groceries it depends on you also...life anywhere will be depending on how you would like to spend your money...be wise to save more money for your future and your family as well.