Star Citizen's Ten for the Chairman basically describes Tramp Freighters Online
Star Citizen's Chris Roberts and Tony Zurovec teamed up to field backer questions on a new round of Ten for the Chairman this week. This episode is at least in part about stuff, literally: The early questions focus on cargo and salvage and how it all works. Star Citizen is all about the realism and the ecosystem of living and trading in space; you'll be able to truly see the stuff you're buying and hauling, there will be a combination of automatic and manual cargo unloading, salvaging will be a completely legitimate playstyle, "player-generated mayhem" will be possible across certain parts of the persistent universe, and you will indeed be able to "move fluidly between professions."
Roberts also addresses the basic difficulty of just keeping your hunk of junk in the air. "There will definitely be a certain amount of maintenance keeping your ship running especially in the bigger ships," he says. "If you’ve watched any science fiction movie and you’ve seen Chewie banging the Millennium Falcon or the crew of the Nostromo having to keep their ship running and stuff like that."
It's definitely worth a listen, especially if you're my kind of geek -- i.e., the kind who isn't much into World of Evil Space Jerk Empire but thinks the idea of Tramp Freighters Online sounds damn fun.