Here is the very basic (I mean very very basic) calculation

Food 3 times a day - Minimum 30QR (900QR for a month)
Transportation - Minimum 300 QR a month (if your company providing transportation or you stay near by its fine, but still you will be going out)
Telephone and other expenses - 500 QR a month.
Other expenses - 300 to 500 (Laundry etc)

So we are talking about 2000 QR basic expenses

you will end up saving nothing