The cost of the required instrument setup will depend on which instruments you choose, especially which size and maker of the gong. Gongs range in price from $725 to $6000 so this is the biggest determinant of the price of your setup.
The lowest student price for a basic version of the required setup with quality instruments is $2400 (2024 pricing). This includes five crystal singing bowls with mallets, a 32" bronze Chau gong, a large gong mallet, a pair of small gong mallets, and a 16" bead drum. This does not include tax (if applicable), shipping, instrument cases, or a gong stand.