This 31-year-old turned his side hustle into a $300,000 vending machine business: 'I work just 4 hours a week now'

Marcus Gram, 31, made $5,000 the first year from his vending machine side hustle. Now he's on track to make $500,000 in sales by the end of 2022 — and works just four hours a week. Here's his best business advice.