Looking for info on programs related to architecture/house building
Preferably w/ the ability to find the true volume of different compounds in the build (eg. bonus points if we can put the price of a 2x4 in and it calculate the price of the wood required)
Expanding on this concept: Do any of these programs aimed at architects have a capability of easily exporting to blender, such that they could be imported into Unity or UE?
Check Sweet Home 3D for visualizations. Though it's probably not what you're looking for.
So I use Fusion360 for the technical building of components; framing, drywall, cabinets.
I export this to 3dsmax and flesh it out for archviz. Rendering with V-ray.
Unfortunately there aren't any good options for pirating either of these softwares.
3dsmax and vray also have very steep learning curves.
There are also better alternatives than Fusion360 which include BIM features, but they're insanely expensive unless you own a profitable architecture firm.