If you want cost effective buy an already completed car off eBay for about $25-30k. There are several in SoCal and Arizona To build yourself use a fiero - its still going to cost you $30k+ with the stock engine . i believe north hollywood auto body will install the kit for about $8500If you want to upgrade powertrain use a 3800 supercharged engine swap but if you're having a shop do it even that will be $5k+A corvette engine and Audi trans swap by a shop will be $10-20k not counting the parts cost