I'm going to have to say that too big. I don't want one. Really cool and it looks awesome but I think a 300 gal tank would be big enough for me. I'm not looking to keep monster fish.
It would be cool to have that guy living next door so I could go over and watch the fish enjoy the tank with out spending the time and money. I would be happy with that.
Oh and he must do large fish rescue no doubt. I bet most of the fish are rescues. It does look crowded but the guy spent what $200,000 on the tank made it him self and has been doing this for years. I think he knows what he is doing.
None of those fish look sick. Yeah a little scraped up but that happens. I'm healthy and I'm a little scraped up myself. The older the fish are the more bumps and old cuts you will see. Some of those fish have to be old.