FSD: You’re assuming that they would actually buy in these foreign locales. If one is wealthy enough to be that mobile, then why buy anything?? Least of all a tract home in SD. Just decide where it is you want to live at by season each year and lease accordingly.
Second of all, if only the uber wealthy can afford the SD tract homes, then the prices will rise to the affordablilty level of that strata of society. Then it won’t matter if it’s LaJolla, or Buenos Aires or Australia.
In order for this scenario to work, a disprportionate % of the ultra wealthy would have to want to live in SD as opposed to somewhere else in the world. Are they going to want to buy a tract home off the 56??? Really??