i wouldn't be suprised, 75 feet isn't abnormal for pine trees...i used to love climbing trees, it looks like a nice little setup, though i would wrap the wires attaching the pots to the cut branches super tight with twine againced the main trunk, just to be sure they don't swing around too much, as time goes the sun could make the pots pretty brittle, and all the wind up there might crack it, looks like an awsome setup though and i can't wait to see how it turns out, just be careful man and have fun!