Most people have never even heard of mini farming. The reason? It's really just not that popular as of yet. But just like a lot of other things (bell-bottom jeans, Mohawks and rap music) it's coming into its own. The reason is that regular farming is starting to become a problem for a lot of people. It's just so difficult to make a living as a full-fledged farmer because there's so much work involved and not enough demand for it. The big time farmers, the ones that once were able to sustain large farms and take care of their entire family are having trouble making ends meet.
Part of the reason for that is mini farming but most of it is the lack of business available in larger markets. Major farmers are trying to compete with other major farmers for markets like grocery stores and that's a really difficult market to break into. If you start mini farming however, the only people you're going to be competing against are the other local farmers in your area. What you'll usually find is that there's plenty of people looking for locally grown products and not quite enough people who are selling them. So this can actually be a pretty profitable niche for you.