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Four billionaires who lead a frugal lifestyle

When you think about the richest people in the world, you may envision them surrounded by all the trappings of wealth: race cars, yachts, mansions and other toys that most of the rest of us can only dream about. The term "frugal billionaire" may seem like an oxymoron, but a small subset of the richest of the rich are well-known for their penny-pinching ways. While most people will never have that kind of money to throw around, everyone can take a page from the fiscally-responsible habits of these billionaires. Story by: Angie Mohr | Investopedia. Pictures: Getty Images