I think many people look at prices of buying the parts themself and don’t look at the labor involved if they were not to do it themselves
If you used KK’s parts list cool, 10 grand for the parts to build that nasty motor, and unless you own a shop or have you’re home garage stacked with all the tools, chances are at somepoint your either A) going to pay someome to do certain things or B) cut a corner that may still work but not be up to par with what a properly stocked shop can do.