My answer is, if you spend 20 years on a master plan, it’s time to do something with it. Begin again. Begin again and maybe not even with you, but with someone new and younger and let them take it and run with it. Leave the idea in place because you’ve developed this based on what the community needs in a way of a zoo, but take it and run with it and bring it up to date again. But don’t make it last more than 20, 25 years. Plans are never complete, but you can adjust them. They are only a plan. They’re not cast in stone.