There's been people build DIY aeroponics and hydroponics systems on this forum. If you search around a bit I'm sure you'll find a bunch of threads about it. There's pro's and con's to both way, though.
With a commercially-built system you get a certain amount of reliability, ease of use, and so forth. They've got all the stuff figured out and it just works. Of course it costs more and isn't always tailored to your needs.
With a DIY system you get a lot of satisfaction of having built it yourself, perhaps saved some money, and you can build it exactly the size you want. The drawback is that if something isn't done right, your system might not work and you don't have anyone to blame but yourself. (No customer service department to complain to and get replacement parts from.)
I'm a DIY'er, but not everyone is.
My advice would be that if you can't look at the AeroFlo and see how to build one yourself, don't try. Build something small first - a basic tub-based aeroponics system for example. Then, once you've done that and proved it successful, the bigger things make more sense.
Kind of the same principle as learning to build a doghouse before you try to build an actual house.