(Allegedly) When I was working over in japan I came across a store there that sold some wine that I came to like a lot, from time to time I (Allegedly) would send sever cases home over time marked as "Bath soap".
Perhaps you should try it at various stages of the year ( leaf bloom, mid season, end of season pre browning). I suppose you will make a "tea" with the leaves, add some sugar and other odds and ends then ferment. A spin to win.
God speed on your endeavor!
I have a decent way to hull them, and have grandpas goody grabber for shelling them, its more along the lines of still time consuming as I still have two gunny sacks full of nuts that need shelled.
Not sure about the leaves but I know the hull were used to de worm pigs, we would boil the husks in water and dye our traps in the tea when I was a kid. As for consuming the leaves it will be interesting to see how it turns out.
I have only lived in this area for around 3ish years and so I have been busy building my family. now I am completed with that task I am planning on looking Grape & Granary and I will add Vine n Hop into the need to go see list as well.