My brother and I, in High School were art-school nerds... Our first venture was silk screening T-Shirts of Racing Hydroplanes... we ended up selling hundreds of them in less than a week over on the shores of Lake Washington, in Seattle, where they hold the Gold Cup Races.
That was back when you had to carefully cut out the silk screen transfer stuff by hand (before photographic silk-screening)
...Why in hell we didn't stick with it --- I'll never know! We'd probably be rich nowadays!
"If it keeps up, man will atrophy all his limbs but the push-button finger." Frank Lloyd Wright