I don't see the need to babysit hydro grows, and you can save a bundle of cash by building your own hydroponic setup. Get a couple of 18-20 gal tubs (reservoirs), some aquarium grade silicone (to makes water-tight seals), some nozzles (for your tubing), a pump (goes in the reservoir/s to the tray and loops back down the trays drainage and back into the res), tubing (for liquid transfer from the res to the plant tray), and a feeder with some feeder lines, a few timers to set your feed/co2 schedules and don't forget the nute solution and all other necessities like cubes, plugs, drains, co2 bottle, air stones etc : )
make sure to get nice reliable pumps, you don't want those failing.
http://www.htgsupply.com/
or just buy a complete hydro setup from those guys