Yvo Schaap, the creator of Directlyrics.com, recently wrote a detailed article on Indie Hackers about how he's been living the 4-hour work week for the past decade: https://www.indiehackers.com/@yvo/how-ive-lived-the-4-hour-w...

He created product where the brunt of the work took place in the first few months/years, but the SEO traffic paid dividends for years to come.