One difficulty is that you can't control who else will move in. You could argue that an informal "free state project" has been going on for years, as Americans move to lower tax states. As the economy begins to pick up in those states, other people move there who aren't committed to lower taxes and less government. They want the "social services" and "safety net" that they had where they came from.
Another problem is the life cycle. Young earners in the prime of life are natural, small-l libertarians, though most don't go whole hog. Adolescents, couples with young children, old people, those with aged parents or ill health are more inclined to turn towards government. And rebellious younger generations often turn against their parents.
A third problem is the business cycle. A stiff economic downturn and unemployment may rattle even the most committed libertarian. But it will be interesting to see what will happen. Will corporations rush to invest in the state or will they hold aloof, expecting it to be a mere flash in the pan?