I like the OP's Utopian vision for resurrecting Detroit, I had a similar idea related to other manufacturing ventures. The infrastructure should mostly still be in tact. The only thing that is missing is the industry. The perfect fit to me is the green energy industry (solar, wind manufacturing). It's the perfect opportunity to get Detroit back on it's feet, and reduce our dependence on fossil fuels. Throw in a tax break that both sides of the isle can live with, and there would be virtually no opposition.