at the risk of sounding like a billionaire bootlicker, the 11 richest NFL owners are first generation owners mostly coming from middle or working class families. Only 1, Stan Kroenke might not be self made - he married a Walton, probably used her money to start his highly successful real estate development business. Jerry Jones' parents owned a couple of grocery stores so he may have been upper middle class, but nothing like what he's worth today. There are a couple others that come to mind like Daniel Snyder and there a couple of female first generation owners that inherited the teams from their dead husbands. so it's likely 40-50% of the league that are first gen owners.