My friend, whose Lakeview house was shown on an earlier episode, told me that the buyers are actors. He said he was home during the 3 hours it took to film and he was disappointed in how little they showed of his enormous house. His house was not selected by the fake buyers.
No one who lives in New Orleans considers any property on the North Shore (Mandeville, Madisonville, Covington, Abita Springs) to be part of the Big Easy. In fact, many New Orleanians move to the North Shore to escape the big city problems (crime, taxes, poor education system, etc.)