My view, hydroponics just adds unnecessary expense...

I built Milady a high tunnel greenhouse. Crops grow in the soil. Roll
up sides and end windows for ventilation. because of my MN location, I
did put in a small propane heater, you wouldn't need it.

http://www.farmtek.com/farm/supplies...nnels_1 .html

If you go this route, I'd be glad to consult.

Karl