Interesting. Come to think of it, no one on this forum I know of has gotten into breeding rays. There is someone in Surrey who has contacted me in the past who supposedly has invested quite a bit in a ray breeding program. They do not post on forums, however, and I have not seen their operation first hand.
Having seen some pics of breeding operations in Japan, I gotta think its a pretty hefty investment to do it. Alot of space and alot of expensive rays needed to do the volume you need to make it worth your while.