Ive always done it overnight or longer. Why pay for a cold brewer? You have one. It's called the Iced Tea Pitcher, or the Mason Jar. Throw beans into cold water and let sit overnight. Filter and drink. Use your french press to speed the filtering the grounds out process if you want. Throw in there and push down. Better yet, brew the thing in your french press, next morning pull out of the fridge, press down and serve. Ues the 50 bucks to buy some good greens to roast.
Aaron