In 1968, Schwarzenegger and fellow bodybuilder Franco Columbu started a bricklaying business. The business flourished both because of the pair's marketing savvy and increased demand following a major Los Angeles earthquake in 1971"
"By the age of 22, Schwarzenegger was a millionaire, well before his career in Hollywood."
FYI, that "marketing savvy" involved going to door to door and giving homeowners a free appraisal of the state of their chimneys, which would invariably collapse. Because apparently it's a lot easier to push over a chimney than it looks, especially if you are a bodybuilder. Schwarzenegger admitted this on the Johnny Carson show back in the 1980s.
"Bricklaying Business
In 1968, Schwarzenegger and fellow bodybuilder Franco Columbu started a bricklaying business. The business flourished both because of the pair's marketing savvy and increased demand following a major Los Angeles earthquake in 1971"
"By the age of 22, Schwarzenegger was a millionaire, well before his career in Hollywood."
http://arnoldaloisschwarzenegger.com/biography.html