Video game machines makes big profit

I have a friend who is a brilliant businessman. he doesn't go to the office everyday and he has no laborers for him to work. Are you puzzle up what kind of business he has? He is making big profit of his business called video games. he used to assemble video game machines with a coin slot in the middle and a timer. He already have ten video game machines and have it placed in an area where it is heavy populated. a drop of single coin gives a 4 minute time to the players. He averagely earned 3 thousand every 15 days and gives 30 percent share to the vendor who owns the place. what a good business he had. I am planning also to follow the business that he is into.