I dont know what type of hydro setup you are looking to build. I used this website to get some design ideas. http://www.jasons-indoor-guide-to-organic-and-hydroponics-gardening.com/hydroponics-growing-systems.html
The info is easy to understand for the beginner. I used the plans they had for a 6 plant system and downsized them for a small 2 plant system to put in my closet. It cost me around $80 to set up (not including lighting). Good luck.