Learn to do this in my Emily Carr course on “Building Architectural Models and Maquetttes”. This is a typical model built by one of my students. It took about 20-24 hours of work with hot gluegun and foamcore. It is a ‘design sketch model’ in that the purpose is to be able to build-change-rebuild during the design process. Generally, buildings designed with 3d modelbuilding supplementing the process are richer in terms of form. It can look quite finished if photographed carefully, but the main purpose is for design.