Patriot,
You are a smart man and in business if I remember correctly.
$10 a wheel, will not cover the cost of changing and balancing a tire, not even factoring in the labor cost.
I suppose that some would like to purchase their tires elsewhere to save a few bucks as well. Ever hear of this?
Ins, Equip, Chem, Hand tools, Weights, Admin.
I don't like working for free. Does anyone?
When you changed those car tires so rapidly. were they steel wheels? Minimal caution required, used weights re used. 4 or 5 lug nuts each with an air gun.
If I could do your tires for 10 bucks, I would. But since I can't, I won't.
Bulldog