Check out Medieval watermill 3D model on CGTrader for $50. High-quality mesh by BinoZibi: 620000 polys, 620000 vertices. Textured.
C4D (Cinema 4D, filesize: 80.7 MB), OBJ (OBJ, filesize: 80.4 MB), FBX (Autodesk FBX, filesize: 138 MB), 3DS (3D Studio, filesize: 73.1 MB), DXF (DXF, filesize: 72.9 MB), STL (Stereolithography, filesize: 10.9 MB)