It's hard to answer this question if we don't have any examples of what you think of as conservative "nice places to live." The affordability bar varies wildly

It's hard to answer this question if we don't have any examples of what you think of as conservative "nice places to live." The affordability bar varies wildly even in red states, and you also have red state/blue city stuff going on a lot. So I'll turn the question back like this: what do you think are nice places to live that have demonstrated effective solutions to affordability and mental health problems at scale in a relatively dense city with high property prices from high demand? In my experience, the way this is "fixed" in a city like Phoenix is a combination of: "be able to sprawl outward further and further without yet getting completely blocked by geography so there's always somewhere to put new construction to keep costs down" and "have inclement weather that pushes the homeless out so we don't have to be the bad guys ourselves as much" - but these are basically the opposite of the most common proposed "if only the government could get it together" fixes for SF: denser construction and confinement. Those tools are likely necessary for a city like SF, but it's not like there are Republican cities showing how to get it done.