In 12 years, Antoine Walker(notes) made more than $110 million playing professional basketball moderately well. Take away taxes, throw in some adidas endorsement money and a "NBA Live 99" cover, and he's left with, what, $60-to-65 million? Whatever the details, it was a big chunk of change, which, amazingly, wasn't enough. "[Walker] liked to move in an outsized entourage; his mother estimates that, during his playing days, he was supporting 70 friends and family members in one way or another. And speaking of his mother, he built her a mansion in the Chicago suburbs, complete with an indoor pool, 10...