you don't seem to understanding finances and how a business make money.  all private businesses must make a profit, otherwise they will fail.  the owner cannot continually provide more operating funds, they will go broke.  the demand for the SF was just not enough to make profitable in the long run.  even if their fares were less than interisland air fares, they did not draw enough people away from the airlines to make it profitable for them.  the boat was too big, many times it was only 1/4 to 1/3 filled.  it took 4 hours one way, thus not attractive for those day trippers.  Can't do much or see much with only 2-3 hours of time from arriving to departure.  the Kauai people did not miss the SF.  one thing they feared was that the homeless would have easy access to their island as cars can be shipped too.  Also, maui people were not happy with Oahu people coming with their cars, would over-burden their beaches, fishing, etc. in addition to the homeless problem.