Much common ground in your reply to me.After all, this part (about the interest from station services) may be as well left out completely if it turns out too controversial.
How about non-monetary 'profits'. For instance, the number of advertising boards to indicate the amount of business going on. It's there, visible to all who visit to indicate how successful the outpost is. Instead of credits, player owned structures acquire status over time, which would be shown in game in all sorts of various ways. The outpost/station could go from a space-garage poor man's look to a shiny polished and glassy look. Would also provide bragging rights.
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