Going on a cruise is one of the best ways to travel, for the money.  Everything you need is right there.  Be careful, though, it is definitely VERY easy to eat way to much.  The food is SO excellent that you just won't be able to help yourself.  All of the entertainment is right there on the ship, too.  They have so many things to do that you won't be able to decide on what to do.  The broadway shows are amazing.  They have beautiful costumes and the music is wonderful.

The only other expense you may have is if you want to go on an excursion.  This isn't always easy to decide on, either. ...