John, this is a tough one.
If you want to take the job, even if it is at the rate he offered, I would first ask about pay raises, how often and how much to expect, given that you have excellent performance reviews.
But bottom line, take the money out of the equation.
Can you, or have you ever had a job similar to this. If not, you will be pulling out your hair( knowing you are bald, then it has to come from somewhere)
because so many things will be smacking you in the face.
This man wants things done his way I am sure, so, how and who will train you.
This is not a hands on job like you are used to. There will have to be a lot of delegation. You will have to learn to talk to the employees, in a way the will respond positively. You will be the front man, when ever issues arise, whether inside or from the customers, it YOU who has to make them happy. You will have to multi task like you have never had to do.. Everything that goes wrong, it's on you. Everything goes right, don't always expect a pat on the shoulder. You will have to make requests to people that they do not want to do. YEah, you will have to deal with that a lot.
If you want this job, to give you the experience to maybe better yourself another time down the road with another company that will pay more.
If it's for the money...……………………………..stay where you are