I think you may be missing the point of this fairytale.
Jesus wasn't upset because there was money being exchanged in a church, it was specifically because it was the Temple, the Temple made for God.
The author of John for example even says '
To those who sold doves he said, "Get these out of here! How dare you turn my Father's house into a market!" , it is just a story to try and convince people that God was Jesus' father.
What are the odds of one man clearing the Temple of its traders? Were the moneychangers little old ladies with little purses of money? I think realistically the moneychangers would be well protected and the area in general would be well guarded by Romans.
It is a wee story, you shouldn't read too much into it.
Brian.