Our friends told us about a new quarry that started operations in their area. It's a relatively small business, but they quarry limestone there, used for flagstones and landscaping.
It was probably all the Fourth of July fireworks that got me to thinking about this: wouldn't it be fun to have something like those "u-pick" strawberry farms for stone quarries? That way if you needed some pavers, you could just bring a truck, pay a deposit for some safety equipment and explosives, and come away with your very own stone that you cut yourself from the living earth! The roadside signs could say "Blast your own" or "U-Hew!"
Let me know if you're interested in going into business together.