https://www.youtube.com/watch?v=Zhg2RLdKqvI
I like this setup as long as a disease does not break out it would be sufficient. A QT tank would be a must to treat each fish before adding.
https://www.youtube.com/watch?v=OrIwMs8S494
This is the best way for a water change in multiple tanks in my opinion.
Im sure these could be tweaked to benefit the health of the fish in case an issue arises. This is the way I would try and build my fishroom.
I like both the videos. I like the way the first video's sump filter system is set up. If you have an issue with disease in a tank, looks like you can isolate it and just treat that tank apart from the rest of the system. Very nice set up. I'll keep that in mind for the future...