No need for a debate. I won't mind if you buy one that way.

I have always used a local builder. That way I can use my car club buddy's for feedback before I pick a shop. I can be there to interact directly with the builder and see the progress/work. I can supply the outsourced parts directly, after talking to the builder, and avoid the shops markup on items like aftermarket heads and intakes.

I was there for the last one when the shop broke it in on the dyno, measured the HP and torque and tuned the carb and timing. This builder actually made several calls to Butler for feedback during the build.

I have done 2 motors myself and just feel better that way. Same with the other items I usually farm out - upholstery and paint/body.