It's a little different in the Chacala. The lots and homes in development at the north edge of town have mostly been bought by wealthy Mexicans. Lately some gringos have been buying in there. It's funny. Three times I have heard a gringo/a realtor or realtor wanna-be, who is trying to sell lots or homes in that development, mislead their customers about who lives in the development. I assume they are trying to avoid telling their potential customers that most of the owners are wealthy Mexicans. People who are unlikely to want to socialize with gringos.
It's parked in the street across from the church.
Anyway, I hope I haven't misrepresented his ideas. Here's a link. Take a look. And here's the link. I hope it works.
The Plain Truth About Living in Mexico