So when my son was 2.5 we finally got tired of buying disposable diapers. So, we stopped buying them and invested in cloth diapers. Our stash consisted of 18 Chinese Prefolds, 4 Large Prowrap Covers, 1 Large Bummis Super Whisper Wrap, 3 Snappi's, 2 dozen homemade flannel/terry wipes, and 3 homemade All-In-One diapers. We spent less than $100 on this very modest diaper stash. But, it got us all the way to potty training 8 months later.
With a new little one on the way, I have already started making my newborn stash. My sewing room is covered in cute diaper fabric and I am having a blast!