Billionaire investor Bill Ackman pitched Elon Musk to move Tesla's HQ to a Howard Hughes community. Here's why.

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· *Billionaire investor Bill Ackman wants to cash in if Elon Musk relocates Tesla's headquarters.*
· *Ackman's Pershing Square fund owns almost 30% of Howard Hughes, a developer of master-planned communities.*
· *The hedge-fund boss asked Musk to consider three of Howard Hughes' communities for Tesla's new base in a...