Or he was not a missionary, because in that case he would live in a missionary-home, or he was sent as a pioneer, but that is another story and position. Believe me I have been a real missionary for almost ten years. So give the facts as they are. Most MTS graduates were not send as missionaries. In fact it was rare. A pioneer, even assigned by the branch, and even graduated from MTS is NOT a missionary. In fact if he would have been a missionary he wouldnt have had time to teach, with his home-duties and 140 hour requirement.
"he had expenses" you say. As a missionary you don't have expenses everything had been taken care of, housing, lights, food and you have your allowance. So try again.