Just checked: it's ~4500Qr, not 4000.
Rebel, what do you mean? Are groceries so enormously expensive in Doha that this amount is not sufficient for a somewhat ballanced diet for two or do you mean masses of clothes and other stuff shopping and eating out every evening? If so: we really don't need that, and besides, we need to drag all the stuff we buy out of Qatar again or throw it away at the end of our stay.