I built a Sr, Telemaster for the club to use as a trainer and learned on it myself. Three of us soloed on it. As no new students joined the club all the gear and engine was removed and the plane pu ton the burn pile, no one wanted to store it.
I have trainers given to me and I use them for teaching then let the students fly it until it gets destroyed.
At the moment I have no students or a trainer but when someone asks to learn to fly I spread the word I need another trainer and someone give me one.