I bloody wish there were good modern Esperanto courses. I've found a Michel Thomas method Esperanto course once but it was incomplete. I would really love to buy a complete one (even for a price higher than what other languages cost). Intuition suggests I'm not the only one interested although there probably are not too many. This means the demand, albeit humble, certainly is higher than the offer. You might consider running a croudsourcing campaign and making some good modern Esperanto resources if you really feel interested in teaching people Esperanto.