Back in 2009, I used to own a laundromat. It was a self-service unattended laundromat that was still coin-op, no card system. I wanted to know how much traffic my laundromat was getting, to see busy times of day and get some metrics without having to be there. Thus spawned a little invention of mine, the laundromat watcher.
Back in 2009, I bought a laundromat… I thought it would be pretty easy: clean the place up, respond to voicemails from people that lost money, fix the machines that were broken, and collect the money for a low-stress passive and reliable income source. So I thought at the time.