IT’s an assload of parts. JRZ/Ohlins, Tiliton, Inconel 625, AP brakes, custom DOT windsheild, etc, etc. Shit add up so damn fast. I estimate car will cost me between 50-60K to build to my tastes. I plan productions kits to follow the 40-50K route sans drivetrain, 80-100K assembled turnkey.
The other big difference between that chassis and mine…mine is a fully developed kit car for production(looking to build 50-100 units) that is street legal. His is a used race chassis that he might apply for a certificate to allow road use in the future 
It’s only taken me what 4-5 years to get this far 