Like many others cost or savings is not the reason I brew, altho it was the reason that I started.
I like the feeling of making something that I am proud to offer other beer drinkers.
Also like others my main "house" beers are around $1 a liter including incidentals like LPG, C02, finings, Blah Blah Blah.
If I do a bigger beer IPA, RIS they can get to around $1.50 a liter.
This is nothing new all you are saving is labour. Yes even brewers get paid at the end of the week.
Like going out for dinner, $40 for a steak WTF? But the ~$30 an hour you need to give the Chef is where alot of it goes.
Don't worry about the cost and have another beer.
Drew