-----
As I was spacing out and being reminded that I should go clean the Dungeons of whatever is stopping them from not producing monsters, I learned that Fuyu had personally commanded people to come here and bring food and also materials to begin reconstructing the entire thing.
Wood was everywhere around the forest so that wasn't particularly hard to find, but the workers was what was needed the most, most people in the sect were tired and exhausted, and many were still wounded, so there wasn't much workhand to reconstruct the entire place into its former glory.
So in my steed, Fuyu brought some workers that were part of my Sect or Kingdom or… well, whatever it is. The thing is, they're my loyal citizens so they were happy to come work here in exchange for a generous payment, reasonable work shifts, and free weekend.
Check "The Protagnist's Sister Is Actually the Strongest"!