It very well could be cheaper. I don't know alot, as I'm one of those Noobs here.
But, here a pack of dry yeast costs $2-$3, 650 ml of water is almost free (unless I dip it out of the lake, then it would be free) and a 1/2 cup of DME cant cost too much, when a 3 lb bag of it costs $11. The time...