Look, I don't come on here and beat my chest about my experience but it does includes design, estimating and project management for very large scale projects.
Your analysis is pure poppycock in my professional opinion.
I found your calculations on JBII machine costs so fascinating i printed out a picture of the machine and showed it to several engineers i know and asked if they could tell me how much it would cost to build one......they asked for a ton of additional information...i said no....just the picture.....they couldn't stop laughing and neither can i...LOLOLOLOL!