That would include little gifts for the people who come to see you, in addition of course to the fees for the musicians, make-up people, costumers, wig people, the guys who do the lights and sets, etc. etc. The list is virtually endless. And, of course, there is the O-rei, or gift of thank you money to your teacher. Since, I don't have that kind of yen, I usually perform su-odori, which means I wear a formal kimono instead of a full costume. That means I can do without all but minimal make and that I don't need to wear a wig.
Men are lucky in that respect.
So, in general for a 15 or 20 minute dance, I'll pay about 200,000 to 300,000 yen. Rather than improvising, the great dancers just choreograph an entirely new version of the dance to the same music that's been passed down or they have new music composed for them. Yes, Penelope, you can hear gongs although it's really more of a bong. For 13 years I lived near one of Kyoto's famous Zen monasteries and was bonged morning and night. Tenri-kyo is a relatively new religion and their way of worshiping whatever or whomever they worship is to beat drums and chant as loudly as they can.