I know this might be little different than what you're asking but I thought the responses might be helpful. Sometimes there are already discussions on the question you're asking, so it's helpful to do a quick search of the topic!
My husband had success actually calling equipment manufacturers, grain distributors, etc. It's time consuming, but the information is out there (and will probably be just different enough for each market for it to be worth it for you to check your local area). Where are you wanting to start up?