Some high cash flow business ideas are hiding in plain sight, including parking lots that produce more than $100,000 per month. A former Wall Street private-equity investor who goes by "Kenny Finance" on YouTube shared how this business model works and what to know if you are getting started. "Next time you park, remember you're making someone rich," he said. A Mix Of Short-Term And Long-Term Rentals Kenny said in the video that most of a parking lot's revenue comes from renting parking spaces, and ther ...