Good points to keep in mind. I thought the sportjet was supposed to be better on fuel. I'm hoping a smaller lighter boat will burn less gas. I've seen posts from people running boats like the Explorer 162 and 172 with outboards say they can run all day on a tank of fuel. Other forums have guys reporting 6 to 10gph depending on size of boat and how fast they run. I certainly need to research it.
I'm fully ready for the insurance, maintenance and upkeep costs. My only real concern is the fuel. If $300 - $400 /day is typical I may have to reconsider a river boat. Again, this is where the research comes in. I'm looking forward to meeting folks at the local club to talk with them.