Many people dream of generating enough passive income to quit their jobs and simply keep on living, as Matthew McConaughey famously said in the 1993 film “Dazed and Confused.” One young entrepreneur has figured out how to earn nearly $40,000 a month while working no more than half an hour a day. Here’s What Happened: According to a CNBC report, 32-year-old salesman JP Mancini II owns two boats in South Florida and earns an average of $38,800 a month by renting them out for charter trips. It didn’t require a fortune to get started, either. In 2020, he purchased his first boat with a down paymen…