I don't know what your definition of "dirt cheap" is, but dyna-gro foilage pro is about as easy as it gets, and has been great for everything I've grown from ganja, to peppers, and herbs.
The only thing that's still kicking my ass are g'damn tomatoes....
Regardless, the stuff is a n00b's dream, and an old hands secret imo.
Never puked, fought, blacked out, or woke up in a puddle of my own urine due to cannabis. Can't say the same for alcohol....