If you were ever envious of the owners of the TWILIGHT and would like to get into that type of business, I think I've found just the opportunity for you. The Kentucky River, specifically from Carollton to Frankfort. It's 65 miles of beautiful river with 4 1830's locks.
At Frankfort there is a very nice hotel..the MOR met there several years ago... just above the landing and many fine sites to see.
Some one has started a speed boat run from Madison to Frankfort and it is sold out for the rest of this season and sales going well for next year.
But rather than a speed boat I think a nice excursion boat would be better. A boat like the for sale SPIRIT OF JEFFERSON.
You might not get rich, but, boy would it be fun.