you should max out the bar and fast-track Emma and Felicity's storyline if you want money. A max out bar gives passive 500-1000 weekly and Emma+Felicity pinups give 100+ per session
Thanks for answering. By maxing out the bar, do you mean purchasing all one-time upgrades for the bar? Or does it include investing in advertisement, too? I refrained from doing that until now, because it costs a good amount of money per week and the game doesn't give you any prediction how much more money is to be expected if you do advertising. Edit: I forgot to buy two upgrades for the Sports Day, will do that first.