https://www.smart-stacking.com/tags/passive-income/Recent content in Passive-Income on SmartStack: AI, Self-Hosting & Smart FinanceHugoen© 2026 SmartStackWed, 09 Sep 2026 02:00:05 +0800https://www.smart-stacking.com/posts/2026-09-09-4-years-later-my-3-day-side-project-still-makes-me-proper-income-what-changed-and-what-didnt/Wed, 09 Sep 2026 02:00:05 +0800https://www.smart-stacking.com/posts/2026-09-09-4-years-later-my-3-day-side-project-still-makes-me-proper-income-what-changed-and-what-didnt/How a weekend side project turned into a reliable income stream for 4 years—and the lessons learned from what stayed the same and what broke.