Ouch!
My son owns and runs the premiere window tint operation here. Vehicles,
homes, hospitals, museums, schools, military base buildings - tint that
would stop a .45 cal bullet, local police force vehicles, you name it.
Started this when he was in high school. Not much he doesn't know about
tint. He really studied the science of it. He is working this up. The top
of the line tint currently is a ceramic based tint. This project will take
approx. 50 sq. ft. to do a whole vanagon. No hard price as of yet but it
would be approximately $100/50 SQ. FT. plus or minus a bit. That figure is
not firm yet. But that's about it..
He is preparing a list for choice of darkness as this law varies within
each state.

Will let you know more as soon as I know.