No, I do not want to sacrifice four days for two games. My time is too valuable to do that

An amusing fact: as far as I can recall, when playing the Ruy Lopez I have not yet once in my life had to face the Marshall Attack!

Children can take lessons in that school via the Internet and can score extra points like e.g. in Geography or History. That sounds very promising and is a fantastic basis for future steps.

I have found after 1.d4 there are more opportunities for richer play.

Playing black, I put great stake in the Ruy Lopez: I liked it, feel it, and understand it; in matches with Hjartarson and Timman it served me well. - on preparing for World Championship versus Garry Kasparov

Just make the right estimation of your own strengths and weaknesses, and also that of your opponent.

I don't pretend to anything more than harmony.