The ship is a Vegas class freighter. But there's not really much gambling with it. Running cargo and passengers tends to make you money above and beyond the mortgage for this ship which in turn means that every few weeks, at worst, you can take a vacation to get into all manner of trouble on your own.
As always making money is not enough, you have to keep it. There is always someone somewhere looking to separate you from it often at gunpoint. But as Firefly showed us running a merchant vessel can be a story in itself. there are cultural taboos to avoid, friends to be won, enemies to remove or recruit and that's just your crew. Making deals among the locals is hard.
Oh, some of the people who try to do you out of your money are stowaways. You best learn about them.