What do you think someone would pay to stay in someone else's driveway? I seriously doubt that anything above $20.00 a night would get any responses at all. For that $20.00 you are providing electricity, water and possibly a sewer connection. And don't forget, everyone wants wifi and Cable TV.
You would have to be there to make sure you got paid and they got into the site without driving over your lawn jockey. Forget the trouble with the neighbors, the zoning people, the local law enforcement and everyone else, it just isn't nearly profitable enough to put up with strangers in your driveway. Remember not everyone has been fitted for Angel Halos.