looks pretty small to me, the lower part has no windows so I'm pretty certain it doesn't have any cabins, also it doesn't look like a passenger boat but rather something that would be used for trade purposes, the reason why it was so cheap, if I understand well it was common occurrence back then for people to buy cheap tickets on trade boats to travel for cheaper, from what I can tell if you assume there are only cabins on the top part they could fit 30 very tight ones
[youtube]http://www.youtube.com/watch?v=lyPbaxxJ5LA[/youtube]