Entrepreneurship's Greatest Challenge: Rebuild Detroit

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Ponyride

A 30,000-square-foot warehouse designed for artists and entrepreneurs. One tenant is Veronika Scott, whose Empowerment Plan hires homeless women to make coats that double as sleeping bags.

Rent: 10 cents to 20 cents per square foot

Test Case: Developer and designer Phillip Cooley sees it as a study of how the foreclosure crisis can positively affect communities.