what are the various things we can do to discourage foreign billionaires and investment firms from buying ten, twenty, several thousand single-family homes, let's say, as a safe store of wealth in the middle of a u.s. housing crisis
an economy that didn't force people to try to get stores of wealth using houses, and didn't create housing criseses in the first place, might be a good start
Eliminating all tax breaks for investor or second+ homes would go a long way toward this. Prop 13 ought to be either eliminated or limited to occupied primary residences.
Eliminate zoning laws/barriers to constructing dense mixed use housing supply.