All I can offer is wishes of good luck with your endeavor.
It sounds like a great idea but in Iowa the whole market is tightly controlled by the State. Anything being shipped into the state is subject to all import duties, taxes and distribution regulations as the beer on your grocer's shelves. Since you're already paying retail the taxes are calculated on that value. It gets very expensive, very fast.
My wife and I looked at one of those wine-of-the-month things a few years back. Seemed like a fun idea but at check out when you put in a Iowa address the monthly fee went from ~$50/mo to ~$115/mo. It lost some of it's appeal at that point.
I hope you find a good source.