I think this quote sums up his income method
Like all of my many ventures, there is no one enterprise that is able to pay all the bills all by itself. Every venture that we do is small. I don’t have the job skills, tools or education to earn $100,000 and $100,000 seems like a big scary number to me. But I can a dollar. I can sell a dozen trees. I can sell a couple of sticks, some cut flowers, some asparagus, some mushrooms, some salad greens, do a couple tours, speak at a conference or two, teach a course, grow some peppers, sell some nuts, make some cider, sell some pigs and some beef, sell some firewood, etc., and it all adds up. No one thing does it. They all are key.