When you think about "rich zip codes" in Montana, the smaller foo-foo ski towns or lake towns might spring to mind first. Depending on what measure of wealth we use, you might actually be right. But in this instance, the question was specific and didn't have to deal with accumulated wealth or real estate holdings.
With lack of sun in the cold winter, plus lack of resources for mental health, one may think it's impossible to be happy and healthy. I’m here to remind you, nothing is impossible. Let's do this Billings!