I think that Hitler could have had a much greater chance at creating a Thousand Year Reich if he hadn't insisted on it being so big. If Hitler would have foregone the invasion of the Soviet Union, he could have had an empire that would have stretched from his half of Poland, up through Denmark and Norway, and all the way to France in the West. He would have had no enemies on the continent except for (to some extent) the Soviet Union.
If he had defeated all of the West and then not turned East, he might have succeeded. He might have had a situation where England's only choices for allies would have been Germany or Soviet Russia. England might well have chosen Germany if that had been the situation. Germany could then have been the center of an empire (and alliances) that encompassed all of Western Europe.