i would be worried about that much fabric just being stored becoming discolored with time-
i started my cathedral window project 2 years ago- i work on it here & there- i am using a small print white on white- when i need more i go to the lqs and buy another yard---the thought of it needing 30 yards of fabric is overwhelming enough to make me not even want to work on it- so much easier to just pick up what i need when i need it- a yard or so at a time. different prints of wow fabric just gives it some texture/movement and interest.