Cool idea!
But I just realized that the law won't let us have a monopoly...
So I'm afraid you'll have to set up your toll booth (and lemonade stand) on one side of his driveway. And I'll set up my toll booth on the other side. We'll be competitors and offer him a "choice" in the market (wink-wink).
(Hmmmmmm.... I guess that means I'm gonna have to think-up something better than a lemonade stand...
Sheeeesh... there's always a catch...
this market competition stuff is rough!)