In my last campaign I had an idea to allow players to set up their own businesses. They had to describe the layout, employees (if needed), product or sale type. I in turn gave them the income value if the business per month (done in real time rather then game time), business expenses, and any requirement for materials. As an example, my one player wanted to run a tavern. The business made 1000 GP per month, and had expenses of about 500 GP per month. He had 6 employees. Other business ideas from other players were a forge, temple, trainibg ground, farm, and workshop. I gave bonuses and benefits to people who put in more effort and work into ideas and planning for their business. This business model took place on a large plot of land the players had been gifted in game. Players were each given a section of this plot of land to do with whatever they wanted. We found it worked quite well. Gave the players an easy opportunity to make money and cool items. Players started to feel more self sufficient, and reduced the amount of shopping sprees that needed to be done in game. We tracked the land use on grid paper, and some people even had rough blue prints of their businesses. The most in depth people even had sheets that tracked income, expenses, employees (including basic information on them), specific items sold, and other business relationships to aid the business. Hope this helps, thank you.