We could keep it rather simple, for instance if we broke the game up into sections/chapters/arcs/acts whatever and say "The Ship needs 5000 Credits at the end of every section to cover food/repairs/replacements/fuel etc etc"<br/>When we're offered jobs, they offer pay. Risky, illegal jobs will obviously offer more then safe, legal work. When we get a number of job offers every sits down and decides the course of action. We don't need to go into detail about what part of the money goes where, just need to get the money and so long as money is coming in they have almost (yes almost, in true firefly fashion) enough to get by.<br/><br/>If we have the 5k at the end of a couple of jobs, we pay everything we owe and divy the rest among the crew. If not then something suffers.