In our largely urban world, most of us don't need a tractor, but those of us who do have undoubtedly thought about building one at some point. There are as many functional tractor designs as there are builders. Here are a few different examples:
Homemade Tractor from Junk Car Parts by Keith Rider
Homemade Tractor by Fairlane55
Starting a 1923 Model T Ford homemade tractor by Robert Merz
Homemade tractor by steamer123
Homemade Tractor by benjaminwayneb .
homemade tractor aka the little mule by TherealSamlinder's channel