That guy has some serious cars over the years and the detail of the turbo restoration is amazing, and I thought I was bad. I love seeing people going to those extremes with cars, if I had the funds I would too.
I had a 2002 turbo restored over a couple of years in Holland and lost my nuts when i had to sell it. The guy that did mine would be considered the turbo specialist on the planet and has looked at and sold more turbos then anyone else.
I guess it depends also on what extent you want to go to with the restoration. Do you preserve some patina, go factory fresh maintaining original parts (what I did) or try and go better than when it left the factory. There needs to be a balance as I really like seeing originality in a car.
Here is an album of my car showing various stages. This was an Italian 2 owner car that was sourced from Italy.