Okay, I'm honestly curious about this, as I saw another listing similar to this where they said something similar about the studs being intact, and it just seemed like an absolute joke give the house was missing the entire roof and seemed to basically just be the framing, yet was listed for about $200k less than surrounding homes. Just seems kind of crazy to have to have to worry about that and deal with the material and labor costs of all of that plus the fact that it'll be known the house was severely fire damaged at some point. I know basically nothing about the subject, but it's just difficult for me to comprehend that being a better move than just tearing it down and rebuilding.
Typically when you build with the existing frame, you don't need to re-permit for the framing which will have to be brought up to existing code. So the cost would be less.
This reminds me of our home that was next to a burntout shell.
We had "smoke and water damage" (the flames were in our attic) and that required a year to repair with months to dry out the water, reskimming the walls with new plaster, etc...