He didn't live on a modest $25,000 a year and drive a used car "because I'm frugal or trying to save for some big purchase," Urschel said. "It's because the things I love the most in this world (reading math, doing research, playing chess) are very, very inexpensive."
Dallas is paying its O-Line $41,174,860 this year, $4,574,984 per player on average (including all 9 starters and backups), which is 22.25% of the salary cap.
NFL Offensive Line Spending by Team https://www.spotrac.com/nfl/positional/offensive-line/
And the Giants just made Nate Solder the highest-paid offensive lineman in NFL, "a contract worth $62 million — an average of $15.5 million per year — with a $34.9 million guaranteed."
https://www.bostonglobe.com/sports/patriots/2018/03/14/nate-...
(Simple case: ten guys, two hang out ten years, the other eight share ten years of NFL ...)