Where is the Biblical authority for preachers?

A few days ago, a friend asked me where the Bible authorized paid preachers. He is struggling with some history at his home church where they split because the preacher wouldn’t submit to the elders leadership (which is a separate problem). That whole event started him asking why we have preachers. Doesn’t having a preacher take (whether really or just implicitly) the responsibility we have of evangelizing? How many people say (again, whether consciously or unconsciously): “Why do I need to go here or there teaching? Isn’t that the job of the Preacher? Won’t he do that?”