Well I would say you can do it. But to do so expediently; one would have to retain the horse in a restricted area of such a size that the horse can avoid you, but not escape your influence.
The rest is a matter of communications and understanding; which comes first in that forthcoming relationship Trust or Training? Once you understand the sequence the rest is repetition. Get started ....The time it will take you will depend on your ability to communicate what it is you want the horse to do. In addition to how receptive the horse is and whether or not he is psychologically sound (Sound Minded) And physically capable, iF YOU CAN COMMUNICATE IT; SUCH A HORSE THEY CAN LEARN IT.