Comfort standards have changed too. There was a time that very few had AC here in Colorado since we are at 6000+ ft. The house we bought does not have one and we have adjusted to a few weeks of daytime highs in the lower 90s. DD complained a bit last summer when she came to visit that it was kind of warm. All the new houses here have AC. I can't see spending thousands for a few weeks of uncomfortable in the summer. Perhaps a window unit in the bedroom if the temps keep rising. AS far as guests coming, I will mention it to them and if they have to be cool at all times, they can get a hotel room.