Well the volksgarden is best to run with about 45-50 plants not the full 80. I have talked to several people about it. The most helpful was a guy o here called omegafarmer, but I havn't seen him in a while. The idea is that you root the clones and put them right into 12/12. They will take about a week to get used to turning upside down, so if you want you can veg for a week, but you only have about 18" to work with total, so you start 12/12 quickly. Then 2 months later, since its best to use a short flowering indica with that system, you have 14-18" tall buds. I've been told that the first time you run it, before you really tune in your nutes, and triming(if you do any) that about 2.5-3 lbs is typical. Then once you figure it all out, that 4-6 lbs(depending on strain) is to be expected. They are mounted on wheels so you can roll them right through a door way and out with the plants in it if you need to. You can run a 1000w, but because the light distrobution in the system is literally purfect a 600w works just as good.
As far as the foodle, I've seen it, and it looks cool, but I don't know it seems wierd for cannabis. The volks is a bit more expensive, but it has proven results.