It is refreshing to read how you don't need your business to become big, but rather want it to sustain your life and give you location independence! I am finishing my degree this year and want to do the same. I wish you the best of luck!
I think that the point behind this article is to start really, really small. If you decide to go big later, you have a profitable operation from which to scale. But trying to start big from the outset might be too overwhelming for most people in terms of domain knowledge, financial resources, etc. Small businesses (that have an inherently scalable business model) are a logical stepping stone towards becoming a big company.