I spend about $50 a grow on nutes for 12-16 plants. All I use is: several kinds of guano, liquid kelp, liquid humic, worm castings, and a blend of several organic compounds like bonemeal, feathermeal, green sand, and a few others. I Make teas with molasses and some blend of the previously mentioned ingredients, then I also top dress.
Never have to worry about burning a plant.
Way cheaper than any brand name nutrient system.
Better taste and smell from final product.
Equal yields(this takes some practice, first couple grows, probably won't yield as well as conventional nutes for most growers).
Equal if not greater resin and trichome production(also takes some practice).