As a teenager in Texas, Farr helped his father, Miller Farr Sr., buy old cars, often fixer-uppers from the junkyard, and sell them from a makeshift car lot in the family's front yard, called Farr's New and Used. The Lions were owned by William Clay Ford Sr., the last surviving grandson of Henry Ford, and Farr worked for Ford Motor Company in the dealer development division during the off-season. In November 1975, after retiring from the NFL, Farr invested his savings to purchase a boarded-up Ford dealership in Oak Park, Michigan.