The theater provides movies to the people of Los Santos. Occasionally, the manager may ask Michael for help protecting the establishment from attacks or promoting movie via air flyers. If Michael refuses to help, he will lose his weekly income for that week.
Given that the property costs $20 million, the weekly income is $264,000, and Michael manages his property successfully, it will take 82 in-game weeks to turn a profit (one of the quickest in the game). That equates to 560 in-game days, 13,340 in-game hours and 806,400 in-game minutes.
At times, criminals may shoot at the theater. Michael will have to kill all enemies and evade the cops. Typically, Michael will be flanked by cops and enemies and will gain a three-or-four-star Wanted Level.
Michael will have to fly a plane with a flyer attached to the back to promote the theater. This is fairly easy to do.