He knows what's going on, even if those in the Bubble pretend they don't know. Build the wall President Trump! Buffett son spends millions to boost border security in rural Arizona, report says Howard Buffett, Warren’s oldest son, has become a crusader at the border, using his organizations and wealth to boost security efforts of local authorities and volunteer groups, according to a recent report. While his interest in border security may seem odd, a closer look at the 64-year-old billionaire and philanthropist reveals he’s no stranger to the issue. Buffett owns a ranch in Cochise County, Arizona, that sits just 300 yards from the U.S.-Mexico border. In addition, a report by The Phoenix New Times indicated a close relationship between Buffett and law enforcement, with the former reportedly gifting $30 million to date to the Cochise County Sheriff’s Office and similar groups.