You must have more expensive habits then me. Most of sports people do does not cost much money except if you go fashionable with cloth. Basketball, soccer and such require basically ball and place (which is available for free here). Same with running. Hanging with friends is basically free, so is reading (library) and watching tv.

You can go fancy with entertainment, but people who don't have much money tend not to. In that context, $400 is not such a little investment. (Through phone games can be played for free.)