Single payer hasn't happened in one of the states yet for two reasons:
1. The Democratic party is still too conservative. This is generally supported only by leftmost faction.
2. Setting aside political will, it's even harder to roll out in a state than it is federally for technical reasons, such as A. the federal government would have to permit it (this administration would not), B. if it were rolled out nationally, the federal government doesn't necessarily have to pay for it right away (the Fed can print money, but states cannot), C. larger populations generally make for a more stable insurance pool, so states (especially smaller states) are less ideal than going national from a stability perspective.
Thus, the preference for rollout among single payer advocates is:
1. National.
2. Failing that, a large state. (New York has a well organized pro-single payer movement. The state became fully Democratically controlled for the first time in many years recently and is actively pursuing this now. There are similar efforts in California but AFAIK not as well organized.)
3. Failing that, a small state. (This was tried in Vermont, but Vermont is too small and they couldn't make it work.)
Also the notion that the ACA is an "authoritarian" imposition on red states is pretty wacky seeing how the whole thing basically redistributes wealth from blue states to red states. If I PayPaled you ten bucks, would you call me an authoritarian? haha