frankly, i am still waiting to and would love to see people explain how making their own beer is more expensive than buying it from the store. i don't think its possible except in some absurd circumstances.
Just spit balling here (US dollars):
Let’s say a brewer buys a used system from someone here. The last one I saw listed in the classified section is $5,200.
A new Grainfather all-in-one entry level system = $499.
Average the two for an average brewer = $2849.
Generic Pale Ale:
Rahr 2-row 10# 12.99
Vienna 1# 1.59
C40 10 oz 1.10
hops 4 oz. 6.00
water 8.5 gal 12.50
BRY-97 15 grams 4.75
Total 5 gal batch $39
Over an arbitrary 5 years at 1 batch a month (60 batches + equipment) = $5189
60 batches @ 5 gal batch = 300 gal
300 gal = 38400 oz
38400 oz @ $5189 = .14 per oz
12 oz = $1.68 per 12 bottle
6 pack of 12 oz bottles = $10
I can buy a 6 pack of Sierra Nevada Pale Ale for less than $10 and I haven’t included a mill, an immersion chiller or ice, a fermenter, kegs or bottles, quick disconnects, faucets, hoses, CO2, or bottling bucket and bottling wand, electric cost to control fermentation temps or power the system.
I also did not include gas to go get ingredients, my time, rent for the space, cleaning supplies (water, sewer, chemicals), water profile salts, etc, etc.
Naturally, cost decreases with a weaker beer, cheaper system, longer amortization, etc. Again, this was the first system I saw in the classifieds averaged with one of the new Grainfathers over an arbitrary 5 years for a generic APA.
That’s how the cost of homebrewing can be more expensive than buying it. …and why I only include ingredients in the cost of a batch.