I'll never understand why a shop will stall out a 1 inch impact wrench on every nut.
They never think how some poor guy will have to change a tire in the field.
That, and such extreme torque can waller out the hole taper badly or even split the rim where it is close to the center hole.
Torque spec for Budd nuts @ 300 ft/lbs is just fine and plenty tight.
All of you ought to get the right tools and learn the right procedures to service your own tires. It would be a small investment compared to what you have in the vehicle(s), and you won't have to scrabble around trying to find a shop that will even do them.
On a side note, when I take our Benz cars in for tire work, I have them use the factory hand wrench only, no air wrench allowed. The handle on it is but 9" long...