A few years ago I sat in on a campaign where the rules had a nice table for player-owned businesses. It had things like a bank, a bakery, a grocery store and maybe a saloon as well. I think it was an Old West RPG but maybe not.
The table had the cost to buy the business and some stats on how much profit it would make, based on die rolls for things like competition, location, weather maybe?
I've been searching for a while trying to find this again with no luck. Any chance this is ringing a bell for anyone?