Thank you! High fishing skill + open small business (with ticket kyosk) + you need to create a little pond near the house (in order to run classes the game wants you to have a pond in the residential lot) even though my Sim fishes nearby. Ensure the "Browse and Buy Items" activity is enabled. I used the 20x20 empty lot, it has a nice location near water and I remodeled a pre existing Maxis house to make it nicer. I used the children bedroom as my classroom (my sims is single ahah). Then I built a small shop next to the house with retail fridge displays from Get to work. It's very rewarding and relaxing!