Doing a bit of a revisit a year later.
My thoughts have changed dramatically with keeping fancy goldfish after numerous "mystery" deaths. They would be eating fine one day and floating dead in the tank the next. The other issue is that the vendors really push to raise these in warm temps so that they have less digestive issues and not have bloat related problems. This works for that issue BUT then they have been super susceptible to infections that have spread super rapidly and led to fish demise in a very short period of time.
As of this moment my update is that I am down to just 4 fancy goldfish in just one 90 gallon tank. And of those 4, one is acting a bit 'off' with some swim bladder related thing and not sure if it will make it. If it passes, I will move the 3 remaining fish to a 65B and open up the 90 for other fish.
Another weirdness factor has been a complete color change to a 'panda' that went from an awesome black and white fish to a black and brassy one. A lionchu develop a single little bubble under one eye. Another lionchu has lost almost all its orange and turned white. So a bit of a warning, what you see is not what you may get in the long run.
While I think they can be cute and personable I will never go down this path again. If these pass, likely they will not be replaced with more.