I want to understand what you're saying, but at first glance this is contradictory: housing prices are driven by density, and housing prices are increasing in K

I want to understand what you're saying, but at first glance this is contradictory: housing prices are driven by density, and housing prices are increasing in Ketchum. But Ketchum didn't increase density, and neither did anywhere nearby as far as I can tell. So what is driving the increase there? I've visited Ketchum and think I have an idea, but I'd like to hear your explanation.