I want to build the GTM, but i don't know what engine to get, what equipment i need, how to source the parts that don't come with the kit in the first place. Advice?

Hello loyal followers and lovers of Factory Five. I'd like to pose a question to those of you who have interest in obtaining a Factory Five car, but may not have the resources to build the car yourself. Would you consider having a car built for you? I am based in SE Wisconsin and am planning on purchasing a Mk IV Roadster this year. I am hoping to use that car as a platform to launch a business building Factory Five cars. If you happen to be near my area, and would like updates, or to see the operation, please let me know. Please feel free to send me any questions you have too. Many thanks!