Fertitta's been on top of his numbers for a long time. He launched his career with a $6,000 loan from the bank. Today, the 59-year-old is the CEO and sole shareholder of Landry's, which owns Bubba Gump Shrimp Co., Morton's The Steakhouse, and the Rainforest Cafe.
"Most entrepreneurs come up with a product or they come up with an idea and they think they can be successful with it," he says. "But if they don't know the financial side of their business and understand credit and working capital and what it takes money-wise, you can't be successful. The product is just a product."
The bottom line? "You better know the business side of this product," says Fertitta.
CNBC's "Billion Dollar Buyer" airs Tuesdays at 10 p.m. ET.