???? I'm a transplant from Detroit, Mr. William.
We just got here a little over a year ago....I need at LEAST another few years to turn into a hillbilly! LOL! You might be surprised, though....some of these hobbyists "'roun' theze here partz" are quite good!! Not too many in Nashville "proper," but Chattanooga, Knoxville, and Clarksville have some pretty talented scapists, both "aqua" and "terrestrial."
I know that you were kidding. Still, I was surprised when I got here and saw some of the locals and what they have! You wouldn't would consider Tennessee a big "haven" for that type of thing, but there is way more of it here than anywhere else I've been, including Missouri and Michigan.
And, The Opry is cool. Come on down anyways!!
I would be happy to give you some buce's and anubias in a few months time. I totally agree that a nice buce "patch" around that wood "hole" would look nice! If you want, I can start trying to grow some emmersed for you, and that way you will have the option of not having to try to adapt them from submersed to emmersed growth. Anubias nana would look nice around the margin.
I would suggest that you silicone some rock (put a few jagged piece sticking out and an angle!) from the upper pond to the lower pond....that substrate isn't going to stay long on in between the two places for long due to the current and gravity. I would do it now before you fill it....should be fine after a day of curing, then you won't have to worry about fixing it later on.
Otherwise, it really is quite inspirational, Bill! Orchids would cool on the vines, too, btw!