When I was barely scraping by on a consulting startup, simultaneously trying to build commercial popularity of a small technical niche, I was working on a unique book for practitioners. (It also required that I write some tooling, to fill in the gaps in a practitioners' story.)<p>So I asked a published author from that community what I should expect. They said their book paid for a nice bicycle. And they were able to do it on the side, from a comfortable career position.<p>Although I think my book could've quickly grown a few times the number of commercial adopters in the niche, which then conceivably might've been the critical mass needed to start growing actual significant commercial uptake market share, I couldn't afford to focus full-time on it. So my strategy was to work on it on the side, but then additional speedbumps were thrown in the way, so I abandoned it.<p>This 1,000 True Fans is a handy idea to keep in mind, and difficult even for an established musician like Robert Rich's story in TFA. "Will I have 1,000 True Fans, paying $100/yr.? Or 10K paying $10/yr.? No? Then this is not going to be sustainable on its own."