My first suggestion would be they don't do any structural damage, are out of the way and won't be stinging anyone, and it just would be a waste of his 500 dollars to have them removed.
If that didn't work, I would clean the debris, caulk all the entrances with silicone, make a new entrance at or near the top. Give them a few days to adjust to the new entrance, then set the trap.
Then in a few weeks, I would take my bees and the 500 and go home.