It's a real town, but the service folks are largely priced out at this point (although I'd expect this real estate bubble might not last as there might not be that many people willing to buy at Austin prices in Marfa).
What's perverse about that? When there's suddenly high demand for a limited housing supply, we should encourage those who happened to randomly live in a particular place to consider selling to those who especially want to live in that place.
It's perverse because it effectively forces poorer people to sell to rich people.
I will also note Texas has a homestead exemption, originating in 1876, so this is a well-known issue. It does not appear to be inflation or value indexed, and does not provide relief to low-income people when their house suddenly appreciates. There is a limit on how much the appraisal goes up every year, but it's certainly more than wage growth.
Regardless, the point is OP's ideal town this is not, the people moving there are not moving for the local jobs and economy in a nice little town. The incomes certainly don't support the high house prices.
I'd agree that the agricultural exemption is perverse (as is the whole notion of taxing property value rather than unimproved land value - but ad-hoc exemptions aren't the way to fix that).
Bonus points for using the phrase "happened to randomly live". I mean, the whole sentimentalism about people's hometowns can be taken a bit far, but seriously?
HN comments like this put me in mind of that great quote:
"All of us have sufficient fortitude to bear the misfortunes of others." -Francois de La Rochefoucauld
[1] I'm quite conscious that I'm lucky to have the skills I do, and I'm sure I have better working conditions than many people, but I do work hard
Also, people living in their home for years, being a part of the community, raising families, etc is not random at all. What’s random is the guy who just shows up one day from another state and decides houses are cheaper here so he can pay $100K over ask.