Yeah, my original idea was a bit more elaborate. But that was back when I still had plans of winning the lottery. LOL This one didn't have a pond, just the tubs, and admittedly, I didn't put near as much thought and planning into this quick idea that I did the original. Plus I actually used software for this one, and it is lacking some symbols I needed. But hey, I bought cheap stuff, and you get what you pay for, right. LOL
I had thought of a separate sink in the main room for cleaning, but just never redid the drawing. The whole contamination thing did come to mind though. On those lines, if you enter the Q area, exhaust fans kick on to create a negative airflow from the main room for those possible "airborne" type of bugs. Probably some other features I just ain't thinking of, or would add as I went along.
But I was just playing around with this idea, never really got serious about it.. I never did win that lottery so I could make it all work.