Whether they will live here in the future or not, since they have taken up the task, they will build it, creating the abode of the Immortal Sect they imagine, whether it be caves or the main palace.
Their previous residence at Nangong Ximen was quite good too. Following standard mountain construction practices, they used the best resources available.
The decorating materials were extraordinary. They had bought some materials on the main street before, and some were crafted from their own clan's resources.
There were places that specialized in Immortal Sect construction materials where all sorts of business were done, and their clan's people did not only refine artifacts but also made some weapons.
Just like the Array Masters familiar with formations, they would employ formations in both artifact refining and other crafts.
For example, the construction of the current palace and Immortal Sect required the participation of Array Masters.