One of the first things I did when I decided to open a brewery was sign a hop contract. If you're relying on hops that are scarce in the market (i.e., newer experimental varieties like mosaic, el dorado, citra, etc.), you'd do well to contract. We did a one-year contract with a couple of brokers for our first year. Once we started to see our beer sell, we signed a few 3-year contracts to ensure that we would have the varieties we depend on for years to come. I think it's one of the smartest things we did as a startup. Good luck!