If the intructors are retired, I'd try to get one of them to commit to an intensive session when you could take a few days off from work. I'd bet that if you have decent eyesight, good reflexes and can chew gum while walking, that you could get the basics down in this amount of time and then practice whenever it is convenient for you at your farm field. Two or three days in a row would help you a lot more than once every week or so for months. Come on down to La Porte and I'll solo you.