I don’t understanding the property tax unless schools are funded differently there. You have big Mormon families, but an especially large house is only 3K?
I like both SLC and Park City, but I felt there were some downsides. SLC had an unpleasant smell everywhere. Maybe you get used to it. And I saw a lot of homeless, not concentrated but wondering around or loitering all over the place in small groups. Park City was beautiful in the off season, but basically as expensive as here.
Downtown SLC had a ton of urban amenities and was really clean, new, and organized. They also did a good job of keeping it dense but on a walkable human scale. It reminded me a lot of downtown San Jose.
My top escape to the interior West would be Phoenix. Just as cheap or cheaper as other areas, but with big city amenities. They also got the best water deal, so water is cheaper and more plentiful than NV.