I'm not going to talk prices , but there's a big difference in price from track body work to street.
Track can be a 8/10 and look waaaaay to nice for a track bike , while street has to be perfect, every part top to bottom. That's where the price difference comes.
And to say the parts are going to be prepped "ready to go" is never the case, the labour isn't the expensive part , it really is the materials, a quart of waterborne base coat (pearl) is nearly 250 dollars now!
On my paint station, I have 25 pearls alone.
this is only 3/4 of the paint station needed in today's world of colors