Gentrification in 3 steps
Step 1. Buy up property, including apartment complexes, in a neighborhood full of people you can abuse for fun and profit.
Step 2. Allow the apartments to turn into squalid hell holes. (But keep collecting rent from your victims. Remember: They’re just another revenue source.)
Step 3. Hope all of the victims leave before someone sues you. If that doesn’t work out, stall. It’s not like you’ll be without heat and hot water this winter.