Currently 2 RBs in the top 100 RB salaries that signed contracts at 30 years old +. Cordarelle Patterson at 5 mil /yr average and some other guy that I don't remember that was way down there at less than 2mil.Henry is #2 in rushing, behind only McCaffrey. That will likely translate into big money. Here or elsewhere.
I guess it depends on your definition of big money... But typically NFL teams aren't paying 30 year old RBs big money on their 3rd contract.
Personally, I'd be ok with the Titans offering him 9-10m/yr for a couple more years.