$5 Tractor-bulldozer heavy equipment 3D model by udeohalucky4. Available on CGTrader with 6536 polys and 8913 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 319 KB), OBJ (OBJ, filesize: 530 Bytes), GLTF (glTF, filesize: 8.85 MB), PNG (PNG, filesize: 8.84 MB), FBX (Autodesk FBX, filesize: 520 KB), OTHER (Other, filesize: 503 KB)