Usually if a pattern calls for 16 fat quarters you could probably use 8 half yard cuts and it will look fine. I have too darn many fat quarters in my stash. Those fat 1/4 bundles look so tempting in the shop, I can't resist. But I have learned from experience to buy at least 3 yards of coordinating fabric as most patterns require extra fabric for borders, sashing, etc. Good luck with your quilt!