It isn’t the billionaires, it is the funds the billionaires and multimillionaires invest in. I have seen these funds buy under-privileged neighborhoods almost in their entirety in less than a year. They replace the cabinets with builder grade stuff they buy in bulk, same with the carpet, a few.light fixtures and a coat of paint (maybe $5k investment) and they rent them out to working families. A neighborhood goes from ghetto to starter within two years, but rents go from ~$800 to ~$2200 as well. Also, those homes will never be within reach for anyone looking to purchase.