Reminds me of our "plumber" for many years. We had a very old gentleman help us with plumbing repairs. He sounded very intellectual for a plumber. Later we found out he was actually a millionaire who did plumbing for hobby. He and his wife lived in a mobile home park since that was sufficient for them, though all their grown children were professionals. He never really cared for money. He wouldn't give us a bill unless we insisted!
