They can afford it. After all, we're all going to rush out to the theatre to pay and see it, right?! : Plus, we're all gonna wanna buy the DVD to learn more about the camera rig.
Half the movie is likely car shots, so I can see the need for the rig. Not sure they would go this hard core for one scene. I think I will make one just like it. ;D
Apparently Jessica Simpson ) is in the back my friend says. Also, I did not take these pictures so the color of the car could be off due to my friends camera settings.