Thomas J. Stanley gets into this topic a lot in one of his follow-up books to The Millionaire Next Door, called Stop Acting Rich. Like the article you cite, his argument mostly centers on the idea that all neighborhoods will have residents with a certain range of wealth, and that if you pick a neighborhood where you are wealthier than most of your neighbors and can comfortably afford to be where you are, then you'll feel less pressure to spend to keep up appearances.