A 3'x4' pallet will hold 12 24 pk cases per layer 12 high (generally) which equals 144 cases. 2 pallets stacked will hold 288 and be approx. 10 ft. tall. Don't know building codes in your neck of the woods but in Ok you must have a minimum of 18 inches clearance below the fire ext. so if you have a 12' ceiling that is all you can stack. If the 2000 sf is a 40x50 given you allow for manuvering a forklift, cherry picker you should be able to get I would say 8 wide(40') and at least 8 deep(50') for a total of 64 single or 128 double stacked for a total of 9216 or 18432. so the answer would be YES I believe that would fit. You might have to do some hand stacking if you are only 1 pallet high to get the other 800 cases on top of the pallets but it would only be a layer or so per pallet. Hope this helped.
If what you did yesterday still looks big, you haven't done much today.