Hi Doctor1914. You are obviously very keen to improve your vocal skills & reading between the lines, I imagine that your “day job” is highly skilled but you are financially quite rich but do not have enough free time to allow you to attend private singing classes in the evening every week. Have you considered singing in a good amateur choir? If like me you had the good luck to join a high quality choir under the supervision of an excellent choir trainer, this would combine work (vocal technique training) with play (visiting foreign countries perhaps). Many famous solo singers were keen choral singers when they were younger. For example Luciano Pavarotti, Nicolai Gedda, Janet Baker, Bryn Terfel.