My source re the Bushes is from my friend, who has been there twice, now; and I will ask him for more clarifying info. It seems pretty sure that the Bush family has other properties in South America:
http://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_bush53.htm
But here's an interesting article on Chile:
http://www.dailypaul.com/295334/we-left-the-us-we-chose-chile
Thanks.