chroming
I can't guess what it would cost to do that much, but chroming is a very pricey process...to put it into perspective, I spent $70 to have my throttle cable bracket and dipstick tube chromed...and they are small pieces.
You want to consider that chrome on exhaust pipes/tips won't last long at all. I went through 2 chrome tips before I wised up and got stainless steel. Looks great for shows, but it won't last. They rust out and corrode. At least mine did and I cleaned the car every weekend.

