Prefabricated sandwich panel cabins (Polygon mesh 3D model) is available on CGTrader for $30. Original author: mohamed-abaza7770. Specs: 2895 polys, 124593 verts.
OBJ (OBJ, filesize: 2.23 MB), DXF (DXF, filesize: 1.12 MB), MAT (mat, filesize: 96.9 MB), MAX (Autodesk 3ds Max, filesize: 1.38 MB)