I had a question regarding ideas for the economy behind a player run shop. In our group we have someone interested in purchasing store front property, hiring an attendant, and making money. I love the idea, but am not sure how to implement it without incredibly tedious record keeping. We're using 4e and I'd like to implement a situation where perhaps the shop levels as the player does, and then they do a skill challenge to add a modifier?
Anyway, help or direction to a similar topic would be appreciated!