Get Mike McCarey’s Cakenology Vol 1: Car Cakes DVD immediately! He walks you through creating a car cake from start to finish. The car cakes I have done were between 12-14" long. Pricing is very hard, especially for other people in other markets. Your biggest factor of course is this one. Best of luck!
Jenniffer White, Cup a Dee Cakes - http://cupadeecakes.blogspot.com
