RAR,
A suggestion, with the family make up you refer to, I would install a good dead bolt on the room the tent is set up in and carry the only key. Then put the fear of RAR in them if ANY of their friends ever find out that you have a garden growing in there. Orchids have been good cover explaining why you are so protective of what is in the room for some in the past because Orchids are known for being so fragile to any disturbances in their environment.
If I understand your system, you are growing using a drip system over top of a DWC with the roots submerged in the tubes, but how much of the tube will be full of the solution?
Also, aren't the tubes 4" x 4"? That means the net pots are 3" or smaller right? Won't 3" pots seriously limit the size of plants you can grow? What are you going to do when the root mass fills up the entire tube and neither the solution nor the fog is going to drain past/through them? These are questions that my local hydro shop posed to me when I talked to him about the system and I had no answers.
He suggested using the largest post/tube you could find, which I believe are some where around 8" to 10" square,and 6" pots. He suggested using drip emitters on top of the media, which I think is what you are doing, because they are easier to monitor than misters or sprayers inside the tube.
He also recommended letting the nutrient solution drain down the square tubes and from there back into a reservoir rather than letting it stand in the tubes like a DWC would.
Any comments anyone?
On the waterfarm/hydro systems using separate containers and a central controlling reservoir, I don't think any one is DIYing that system here -- at least I haven't heard of it, but I think someone commented in my thread that they were using General Hydro's multi bucket system and they could probably provide information on how that works.
Another thing might be to go to GH's website and download their owner's manual for the multi bucket system and study how they use the central control reservoir. Here is the URL hxxp://www.generalhydroponics.com/genhydro_US/instructions/GH_Controller_inst.pdf for their instruction sheet for their 8 bucket control, which could be used with any number of containers with the addition or subtraction of plumbing.
Good growing asnd even better smoking.