Who knows? Pretty easily 40 million like Tokyo has, and that would already be more than double the current population. Possibly much more. There are a lot of p

Who knows? Pretty easily 40 million like Tokyo has, and that would already be more than double the current population. Possibly much more. There are a lot of people held back by nothing but cost, so dropping prices would increase demand. There are also people held back by other factors, but some of those would also likely be relieved by building more housing.