Find run down areas like Camden, New Jersey. Level this shit to the ground, then get the residents to work building new housing. They can help with the demolition. Give them something to do. It will take a few weeks to define Allen Town like floor-plans for new housing modules and get what is essentially an employee owned corporation managed by the government for their benefit set up. The bricks in this picture could be cleaned and pallets sent to every Home Depot in the country. They would sell. The city will drain money at first. In time the city will pay taxes.
It becomes half refugee camp and half new city under construction. In in two or three years the refugee camp is gone and only a new city remains. A new city of new tax payers who can help fund the next wave of rebuilding.
We have the slums:
1 Camden New Jersey
2 Detroit, Michigan
3 Flint, Michigan
4 East St. Louis, Illinois
5 Baltimore, Maryland
6 Gary Indiana
Six from the top of my head. There are more.
Looking harder: The document matches the area in the photo. The buildings are already down. This does not matter. The Brownfield area is only an example.