Yeah, if he decides to hang up his cleats, he's got options. One of which is probably to do nothing the rest of his life, assuming he's (he and his wife) invested properly.
But IIRC, he has really talked a lot about having joy in playing/competing in the UFL. And to have his boys see him play. At this point, if he plays, it's about that joy. Not the money.
Also, if he lives in Tuscaloosa he'll never have to pay for much of anything the rest of his life. His cost of living would go way down in TTown. He's a legend.