It seems to me that we already have a few little laboratories in which we can observe the (partial*) result of such an experiment.
New Square
Kiryas Joel
The Wolf
(* I say partial because these communities are, of course, subject to NY State and Federal Law. Yet, they also have quite a bit of autonomy to run things internally. You won’t learn about the Torah world should conduct foreign policy from these places, but you will learn quite a bit on how individual communities may function.)