Excavator Construction Vehicle (Polygon mesh 3D model) is available on CGTrader for $26. Original author: mdrendes. Specs: 395045 polys, 258204 verts.
OBJ (OBJ, filesize: 47.1 MB), DAE (Collada, filesize: 29.7 MB), GLTF (glTF, filesize: 18 MB), BLEND (Blender, filesize: 30.8 MB)