Not taking anything away from this awesome build (wish I had that much space to work with!!), but I think a lot more people are capable of something like this than they realize. If you can put a rodent of snake rack together in the first place, you should be able to handle this. Plenty of info to help you out available online.
Owal, are you planning anything for filtering the water feeding into the tubs? Just curious as sediment and mineral buildup are usually the main causes for valve failures in these systems.