1996 Isuzu Trooper Cooling Problem

My 1996 Isuzu Trooper has been overheating and the leak was coming from somewhere I couldn't distinguish. I took it to my mechanic and he said that the leak was coming from behind the intake and that they would have to remove the intake to tell what needs to be replaced. What are the chances that the replacements will be something simple like a hose, as opposed to something complicated/expensive? Thanks!