Missing the point; if you are going to carry a firearm into a customer's home, you damn sure had better clear it with them 1st. I could only imagine what would happen if a customer didn't know and then saw you had one on you - and they were NOT ok with it. Pretty sure you wouldn't be working on that job anymore.

Has anyone done this? Informed a customer that they were carrying and the customer asked you to secure the weapon in the vehicle while working on their home?
Sorry but for me, earlier in life when all the kids were younger and at home, I would absolutely ask the contractor to do just that. Not comfortable with someone I don't know, walking around my house with a loaded weapon. Not going to happen. With just me in the house, I wouldn't care as much. Or if they were working outside on something.