Food worth eating is not much cheaper in the US than in most of Europe and much harder to find. I remember my wife being very disappointed with the quality of the produce in supermarkets like Harris Teeter in Cary NC when we were there for a few months some years ago. And that was the best supermarket in the area. And when it comes to basics like bread it seems that most of what the US eats would qualify as cake in Europe because of the sugar content.