The barrier to many of those is that it takes a very highly skilled individual, with marketing and production expertise--a jack of all trades. Most farmers, in our experience, need to have someone act on their behalf to get into the market. That's where the Dairy Goat Co-operative, which Ben mentioned, is so important. We need to have an organizational level representing the farmer in the marketplace.
So a big barrier, first of all, is that if you can't do it on your own, and if you don't have an organization of fellow producers to assist you, then you just don't have the methodology, the skills, or anything to actually do the marketing directly to the local public.