I was reading an article that was discussing whether today's Judoka are as good as yesterday's. One thing it discussed, is traveling costs. For instance, to train an olympic judoka, you would probably want go to training camps where you could get instruction from the best. One thing though, is it is easier to send one person somewhere then a bunch of people.

An example of this is that by the time an owner of a martial arts school goes to seminar, he might as well put one on at his school. One reason is that then he get's help defraying the cost of the seminar. Also, your working with a bunch more people.