A good friend of mine is with some WWII re-enactors in Ca. I'm sure they'd love to mess with a 3', but there's probably no real money there.
The movie business is very lucrative, when you can get the work. The guy I worked for at Chino is a regular in that business. He was the aerial coordinator (boss) for the recent "Pearl Harbor" movie. There is a listing of aircraft that is maintained for producers to pick from. Movies might bring in a rare buck, but don't count on it.
The touring idea might work. But you'd have to find people who could handle the airplane on a full time basis all over the country. A couple of retired guys (which I'm not) might be the ticket.
Doing rides is NOT a part 135 operation. It's under part 91, so things like TBO's etc. don't apply. The only exception is drug testing for the pilots under part 135 rules.