Mayweather talks about how much he could make at about the 13:40 mark of the video.
He claims that he’s been getting calls about making a return and making a billion dollars. If these claims are true then he would easily be the highest paid UFC fighter of all time. As it stands right now, the highest a UFC fighter was ever paid for a PPV was Conor McGregor when he brought in $3 million at UFC 202.
I doubt we’ll ever see Mayweather in the octagon, but it would be must watch tv if he ever decided to take a stab at UFC.