Thanks for sharing. This is a thought provoking article. I too have wanted to build something and would be happy if it covered something like my monthly rent. There are lot's of great side dish opportunities out there. Just look at the many successful paid wordpress plugins, slack integrations, and so on.
To be honest I've always found myself focusing on what I can build as a main dish for a niche market. This article has given me some new perspective. Thanks for sharing.