I don't see the cost of houses or services declining, BTW. Landscaping? Maid or janitorial services? Laundry? I live near a 2 story hick town, and goods and services are big-city prices, despite Spanish being a 2nd language here.
Anyone who lives in the MacMansion developments have the income, but not the time to clean, garden and etc. They are willing to pay for these services because they have the need to save on time and the income to do so. Most of these services are operated by Americans, and they like to hire illegals because it will maximize their profit margins. There is a social price for this profitable convenience, it is called illegal immigration and all the costs that come with it (crime, health, border, security, welfare, etc) that is being borne by the US taxpayers. If this arrangement is helpful to the US, why is over 60 percent of the American population opposed to it?