you raise a very good point

From what I know as a lay person from another country, hasnt detroit been like a ghost city since the late 80s when all the car plants were closing down there?
Michael moore even did a documentary on it?
In more recent times I understand the city council has also got finance issues so is very keen to get its tax revenues up so would be keen to attract a manufacturer to the city.

I would have thought there would be heaps of buildings and housing avaliable there, along with many unemployed people looking for jobs that they could quickly ramp up a factory rather than building from scratch?