Well i have a story to tell. It starts over 2years ago, a new student with a 46 trainer. For 9 months i had this student , a slow learner, and then he changed to electric. In 3 months he was solo. I was happy for him. Now , this week , he arrived at the field with a new electric model, an SU 31, he asked me to fly it. So i did, landed and told him how beautiful it was to fly, then he turned to me and said , "Good, i am pleased you like it , as it is now yours, in appreciation for teaching me to fly" I was astounded at being given a gift like this. Also it is my first electric model too, as normally i fly my Excelleron 90 with a 120 4stroke up front. So OK, he can afford to give a gift like this, but normally i get my gift in just seeing my student fly unassisted, as we say , solo, and a handshake and his friendship is enough for me to continue wanting to train people. So as someone else said , offer to help your trainer when he wants to fly his model, he will appreciate it , i am sure.
Bill