Isn't that how modular homes already work? My house is a modular. The two floors are pretty much identical under the drywall and flooring; it comes as a one or

Isn't that how modular homes already work? My house is a modular. The two floors are pretty much identical under the drywall and flooring; it comes as a one or two floor option and from what I've been told they just slap the same floor on top of the first in the latter case.