Key word is voluntary. Communism works with people you know and trust - family, friends, good neighbors, etc., since everyone has a good enough idea about what the others provide, need and want, and that they are honest. On larger scales, capitalism is the only known system that works. It's fine to try voluntary communism on larger scales of course, as long as it stays voluntary, but I would expect the consent to be revoked rather quickly, and capitalism to take its place, as long as the communism was voluntary. It needs to be and stay voluntary. I'm repeating this, since non-voluntary communism has proven extremely deadly, and in those cases it was probably voluntary in some regard in the beginning, and I don't know the mechanisms of that - it could be some inherent property that makes it easily derail into non-voluntary.