A millennial hit financial independence in 3 years using 2 levers and one simple formula

"Retire By 30" author Cody Berman and his wife, Lauren.Courtesy of Cody BermanCody Berman achieved financial independence by focusing on two levers: income and expenses.He increased his income through side hustles and saved big by house hacking.He continued widening the gap between his income and expenses, and invested the excess.Cody Berman's income more than quadrupled in three years, while his spending barely changed in that same timeframe.That widening gap, he said, was the key to reaching f