Victor,
I just read a story about a ten year old boy who's going to college. The thing that stands out to me is his math teacher said that when he solves a problem, he doesn't put all sorts of barriers up for why he can't do it. He just does it.
You really want a pond. You have a place where you can build a pond. You've spent years trying to figure out why you can't build a pond. I think it's time you just build it.
Dig the hole and make it water tight. If your soil is not able to hold water, either make it so, or get a liner. There is always a way, you just have to decide that it's what you want and then make it happen.
Eddie
