Let's say that Ben goes on a good enough run where the decision is a close call. If Coyle wants to keep him but minimize risk, he could tell Ben that he gets a one or two year extension but with minimal buyout.
I don't think Ben has even an ounce of negotiation leverage, so I would assume he would take anything as this is the best job he is getting anytime in the next decade.
Extensions are not needed as much in the portal age. Very few players are making a 4 year plan anymore that requires coach security.