Lennox Lewis, left, exchanges punches with Evander Holyfield as referee Mitch Halpern, background, looks on during the seventh round of their undisputed world heavyweight championship bout at the Thomas & Mack Center in Las Vegas in this Nov. 13, 1999 photo. // Evander Holyfield, Lennox Lewis, Mitch Halpern, Thomas & Mack Center (AP Photo/Eric Draper)

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Lennox Lewis, left, exchanges punches with Evander Holyfield as referee Mitch Halpern, background, looks on during the seventh round of their undisputed world heavyweight championship bout at the Thomas & Mack Center in Las Vegas in this Nov. 13, 1999 photo.

How much: $20 million

With total career earnings in the ballpark of $250 million, Evander Holyfield should have been set for life. But the four-time heavyweight boxing champ, whose splurging was right in line with another big-spending boxer on this list, decided to buy a mammoth, colossal Georgia mansion that might be near the size of the state itself. Holyfield paid off the cost of his house - which is over 54,000 square feet and boasts 109 rooms, including a movie theatre, bowling alley and Olympic-sized swimming pool - but the maintenance costs have come close to dooming the boxer in the years since he retired. Among reports he owed more than $500,000 to landscapers to care for the 235 acre property, Holyfield's home was under foreclosure two times last year alone.

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