Check out ditch flails. They all have a minimum weight for the tractor.Implements usually come in HP per when it comes to sizing.
I’ve never seen weight per when it comes to matching tractor and implement.
So what is a good reliable/easy to maintain/easy to run & learn on? I've seen a few older Honda, Wheel Horse, Ford, Simplicity-and it seems like people LOVE those & are not so happy with the newer models.