I would be cool with living in a community that decided to be communist. When a whole nation does it, it fails. I think people are fine with communism as long as they can see they aren't getting screwed, that's about impossible to achieve in a political unit the size of a nation-state.
I don't even think a state the size of, and with the population of the state Tennessee. 400 miles by 130 miles, 6 million people.
The county I live in might be small enough to pull it off, 600 square miles, 90,000 people.
Ideally though, communism needs a community.
I would gladly live in one, but fight like hell to keep my nation from adopting anything like it.