More than likely private space travel will reach Luna before the government for permanent human presence for two reasons: governments can't [economically] calculate and energy in space is cheap versus earthside. The fact is, as energy prices climb [at their floor prices], expect space based solar farms to become a practical reality, and Luna is at a good location to launch construction fleets for such farms in unobstructed orbits to fuel the growing planetary economy. All in all, I expect a permanent human presence no sooner than 2040/50 by private companies, government funded presences won't come until the 2060/70s.