It all depends on whether or not the homes are put back on the market and purchased. If they’re kept empty, then there’s more pressure on rental properties. But if they’re sold, then there’s no net change in the available housing market. Assuming the people stay in the area that have been ejected from their homes. The ejected “owners” become renters. Their old house becomes a rental. Or a renter buys their old house and a rental is freed-up. So there’s a balance.