Someone gave me an old trainer that was complete except for the RX with an old .40 LA engine. Idon't have a clue as to how many people learned to fly with that plane before I got it. I ended up teaching three more pilots on it before one of them crashed it after he did his solo. All Iever asked was that my students bought there own fuel. Other then that they learned to fly for free.
After that it was up to them how much they wanted to spend on the hobby, that free flying went out the window very fast.
Iwas given another trainer this season but I had no students so it is now on it's way to another state for a few months. If it survives the summer I will have it back this fall for anyone that needs some free flying lessons.
Learning to fly is cheap, it's after the solo that can cost my students. Ihave one old student now looking at 40% planes, so much for keeping things cheap!!