I'm assuming he'd had to fork out a lot more than just the "normal fee". If you think about it, the company still has to get someone to Captain the boat (and may a crew member or two?) at the last moment.
I don't care who you are or how many people your travelling with ... I can't see in any circumstance where someone would literally need that house sized room. To sit there and say YEAH, ok we'll take that $18,000 room heh.
Big congrats to Casey for reaching 3 million subscribers! I predict it will take less than 3 months for him to reach 4 million. I'll quote this post when he reaches that milestone and see how close I was.