It would be impossible for me to mark up a $9K transformer to $18K.
I might get 15-20% on them, but then get $5 for a 1900 box.
So it depends, at the end of the year I look at 30-35% as a window, for all materials bought.
My customers may not be able to go to HD to buy things, but they all have the web. That keeps me and my competitors in check.
Do I care if they supply materials? Not at all. I'd rather supply them and make a little more, but I wouldn't risk losing the job, if I wanted it.
I do alot of T&M this way, and make a good living do it this way.
