Many of us here are finding success with MegaCrop from greenleafnutrients.com. They'll ship you a 500 gram sample for the cost of shipping, and with a range between 4-6 grams/gallon through the grow, that's around 100 gallons.But I'm going to have to continue growing without nutrients for a long time, I fear, because I just cannot afford them.
It grows great plants, so you might want to give that a try if it's in the budget. And if you like it, it's much cheaper to buy than most other nute lines.