Goodness! Our local news did a report years ago about police responding to an office building. The ladies reported that in the mornings, every morning when they arrive to the office and are getting out of there cars, someone keeps wolf whistling at them from the apartment building next door and they were tired of being harassed. The police go to the building and start knocking on doors and they found the culprit. Every morning a lady there would put her cockatoo outside in a cage on her balcony, second floor and it looks over the parking lot. I still laugh, of course the ladies weren't offended any more and said they started whistling back. Your post made think of that story. That was one cockatoo, I can only imagine 500 would be loud. I hope things work out, thanks for sharing.
I don’t think we can draw too much from the news story, particularly as the complaining neighbour seems to be spouting off to every news desk they can find and nobody else has commented. Being based in the UK myself, I'm pretty sure this wouldn't be an out of the blue, letter through the door saying 'get rid of the birds' situation. It's quite possible there have already been steps taken to achieve a better resolution - we just don't know without the full information.
I do think, without commenting on this specific case, there is a responsibility on the part of the breeder to ensure they do whatever is necessary to avoid causing disruption to others around them. A large number of birds such as Macaws kept in an outdoor aviary in close proximity to other homes could well be a significant problem for others in terms of noise pollution. If this is the case I feel awful for the birds but my sympathy for the breeder would be somewhat limited.
With a little luck if this is a commercial breeder and not a hoarder type situation there will be enough time for him to sell off any youngsters and be left with just the breeding birds to rehome. 200 sounds like a lot of birds though, particularly as I can't find any online information about him other than the news stories about the noise issues.
I think we can draw that these birds are going to need new homes regardless of the reason. That's the sad part. Hopefully they will all find good homes.