to expand on Tekha's idea. Maybe that's what the tavern could be for. They come back get a drink and then head back out with a small bonus, either to stats money gained or how much they are worth in the retirement village. Also, if I'm offline for 10 hours I'll gain about $500 M, if I let it run open for 2 hours I gain $2 B. Not sure if that's intentional or not.
I got to the upgrade where you put ads in the game and I refused to buy it. Then some guy asked if he could purchase lifetime in app purchases which I thought might be a poor long term investment for an idle game, but I couldn't say no, and then is asked me for a rating and I quit. The game seems like its making fun of games that are just cash grabs, all the while just doing the things its mocking.
 "Guild Quest - Beta"){kind=icon}
 "Game Studio Trillionaire"){kind=icon}
 "MadBurger"){kind=icon}