Earlier quoted context omitted.
A youtube video from the buyer: https://www.youtube.com/watch?v=bbbwv-ZbXDk
Man, that's actually pretty fascinating - to watch that then the 10th video in the series (from a month ago) where the roof is getting shingled. I'm usually turned off by the "broadcast yourself" lifestyle but I'll admit this one is pretty cool. HGTV, eat your heart out.
If you're in the business of making content and advertising yourself... I could see how buying a burnt mansion would be compelling.
At the end of the day, my perspective is that builders like decreasing risk.
Anything saved after a fire is a risk. What's still structurally sound? If so, what are its new limits?
Custom = time and money. And everything in a post-catastrophic damage rebuild is custom.
Sure you can do it, but it might be cheaper (from a total cost perspective) to demolish and rebuild from scratch.