I haven't had a bill at end of cruise over $20 in years; of course, I pay a lot more upfront. My most of expensive recent trip was on Silver Explorer wherein i just had the #300 amex credit and paid $150 for video and $170 for internet.
"Carpe diem quam minimum credula postero"
Seven Seas Explorer - Miami - Venice - Mar 2017
Silverseas Explorer - Arctic - Aug 2017
Seven Seas Voyager - Rome to Beijing - Oct 2017
Seven Seas Mariner - Lima to Buenos Aires - Jan 2018
Silverseas Explorer - Siberia - Jul 2018
Seven Seas Mariner - Australia Circumnavigation - Dec 2018