http://www.youtube.com/watch?v=C4eukbMk83Y&feature=g-upl check that vid out. it taught me the basic concepts of ebb and flow method using a one plant system and i was able to adapt it to multiple sites with a water pump and large plastic storage totes.
http://www.youtube.com/watch?v=C4eukbMk83Y&feature=g-upl thats the video that taught me how to build a one plant ebb and flow system. It teaches the basice concepts and can be adapted to larger operations with a few changes in materials.
http://www.youtube.com/watch?v=C4eukbMk83Y&feature=g-upl try starting with that. It's a one plant system and will give you the basis on how to control timers, nutrients, and light cycles to ensure that you don't burn your plants out.
http://www.youtube.com/watch?v=C4eukbMk83Y&feature=g-upl check that design out. It is used for a 1 plant system but can be adapted to the SOG method using large totes and a water pump with drain and overflow valves.