If your paying a shop to do it, I'm thinking your gonna be minimum $10,000 to $15,000 depending on the quality of parts and level of custom work needed to be completed and that would be just to get it body dropped and sheet metal fab done, then your getting paint work done on top of that. I would think about contacting Stone Fab, GSI Machine and Fab or any of those type of shops who specialize in that unless your up for tackling it yourself. But just remember when it comes to custom work it's by the hour at most shops and can't really give you a quote for that as you don't know how long it's gonna take to do things or what they my run into. Also I'm probably low in saying 10 to 15 thousand dollars unless maybe you use the basic of everything.