Back when I was a teenager my buddies and I use to take a guy on our fishing trips. He did not put a dollar for anything all and would consume great quantities of our alcoholic provisions. This drunk was VERY, VERY good fishermen and he did taught us a lot about fishing.
So yeah he was our couch on those early years and we did pay for his professional services with drinks and fishing trips. Not a bad deal I may say, there was always additional budget for refreshments.
Then we just cut him once we learn what we needed, he found another group just like us.