The gesture of giving could never fully be re-payed, it was a given that giving had more value than returning. The value of things was simply never constant, especially something that could be transferred. K Johnson teaching Luke the basics of martial arts and taking him under his wing was something that Luke could never repay. No matter how big of a celebrity he becomes, without K's interruption in his life, there was a good chance that Luke wouldn't be where he was today.
That brings us back to the present, Luke stood there reminiscing his days of training under the aegis of a Legend in the martial arts field. Apparently, Luke had a thing for training under Legends and other great personalities. Hospitality, security, and everything else the Cirillo family offered was something that Luke could never payback. Even if he were to become the richest in the world.
Thank you for reading and Bad Luck FTW!