Container ships are the most efficient way to haul cargo (per pound) on the
planet.That's just based on fuel cost. Throw in the time factor -
scheduling, spoilage etc and the container ship is #1 by far. Containerships
don't burn that much fuel.

A rotorship is a much more efficient use of wind power for ships. No sails
needed, small number of crew necessary.

http://www.efluids.com/efluids/galle...rship_page.htm

Maybe you can convert RedCloud to a rotor.