'My Brain Thrives on Variety': His Side Hustle Inspired By 'The 4-Hour Workweek' Led to $600,000 in 16 Months
Amanda Breen
created: Feb. 7, 2025, 8:30 p.m. | updated: March 19, 2025, 5:36 p.m.
Mark Hellweg, 42, knows what it takes to start a business "with a fraction of the capital."
9 months ago: Entrepreneur