In 2014, I was earning $85,000 a year as a full-time web developer. While I made enough to cover my living expenses, I felt like I was putting too much of my time into the job.

I knew that there were opportunities to make passive income in e-commerce. So in 2016, after experimenting with "dropshipping" (a business model in which sellers don't need to keep any products in stock), I came across a Reddit post that inspired me to start a print-on-demand side hustle.