I'll have to double check, but I think that's about right. We stopped killing fish with improper pond and lack of knowledge about 4 years ago. I've built a proper koi pond since then and now we're building our collection. I'm in the process of building our second pond (smaller-around 6,000) that will be finished next spring - I hope. That pond will be our prep pond for the show fish. Very low population.
EDIT: I went back and looked at when we purchased our very first fish from Kevin. Is was exactly 2 years ago this month we purchased a Hi Utsuri - Very big girl. She's doing well with us so far.