How much do you value your labor? Even at mninimumn wage if $7.25/hr, with a brew day racing along at 4 hours, you cost $29.00.
Everybody has a reason for getting in to home brew here's mine. I enjoy the process of creating recipies, the ritual of going to the LHBS, scooping grains into plastic bags, milling them, chewing on a few, planning the brew day, the pop of the propane as I fire up the strike water, the adjustments when I take a refract reading, and even the ritual of rinsing out the the grain bag at the end. Oh, and I also get to relive that process every time I pop the top off a perfectly aged stout. It all makes me smile. I don't honestly know what it cost me, and quite frankly I don't care.