I read an analysis of why Detroit can’t be rescused. People move to where the jobs are and employers move to where the employable people are. Detroit ran out the businesses with high taxes. The people left because the places to work left. Now the remaining people are, for the most part unemployable. Even if the city gave land to companies and didn’t tax them, the land itself would require a huge amount of capital to clean up the mess and chemicals and make useable. Then, there’s the problem of no employable people, no infrastructure and no services. If you have a company and want to relocate there are limitless places with cheap, clean land and plenty of potential workers.
Actually the population is slowly being replaced. Detroit has become a tech boomtown with guys like Dan Gilbert (Quicken) who has imported some 12,000 people from all over the USA. There is a LOT of foreign investment going on as well.
https://www.youtube.com/watch?v=I-_uX2ZfqRI
Why did Detroit happen to begin with? How did it do from prosperity to the gutter?...well the weight of the people who sunk it is still there.
So, if Detroit auctions everything off and normal people who want to be prosperous move there...the same thing is going to happen again all for the same reasons. The only way to solve the Detroit problem is geographically separate the "Third-Worlders", as I call them, from the areas that will be intended to prosper.
The people who have left the cities and northern states understand that. Unfortunately they do not understand completely why it is this way, partly because Economics is not taught properly and also because of political correctness.