I think it was absolutely worth it. Germany would never have the resources to be able to have a quantitative advantage over her enemies. The advantage would have to be qualitative, and the Tiger certainly was undisputed King of the battlefield for 2 full years. However, Germany was never able to streamline mass production until too late, so there were very few Tigers around and they weren't being protected from air attack either. Remember, even deadly tank aces like Wittman often fell prey to the Jabos.