Wow, I like what you do in Unity. Personally like Unity, however, I think Blender and Unreal Engine - UE have a better future.

Also, try to build this modular plugin in OpenBIM environment with IFC [1] support, then it will be more useful

If you need some help in this way let me know

[1] https://www.buildingsmart.org/about/what-is-openbim/ifc-intr...