When I lived in Washington DC as a young woman they built 2 big apart mentioned towers to replace some of the "projects" housing. Those towers didn't l at five years. Had to be closed down and residents moved out. Residents had stripped them of copper pipe and sold did. Removed refrigerators, stoves and toilets and sold them. Rehabbing them was going to coat millions. I moved awsy. Don't know what happened to them.
Refugees should be settled where they can integrate into the mainstream. If they are settled together they may be more comfortable, but they will not integrate and become self sufficient. Otherwisendon't bring them here. Temporary facilities closer to their homeland do they can be encouraged to return and rebuild as soon as possible.