I have noticed that alot of brewers make the comment about things adding up the cost of a batch.
I will admit that if I can cut a cost I will, but I do find it helpful to rationalise the homebrew costing as follows
(All prices approximate based on my local HBS and supermarkets, and in $Aust.)
Assumption: That a special brew is at least as good as a premium beer from the commercial breweries.
Cost of a case of premium $45 ish
Tin of top quality mix $15
Liquid Malt 1kg $10
Hops either bags or plugs $5
Good yeast (Saf) $5
$35 you got at least 2 slabs from the batch. Down to $17.50 a slab. Can anyone remember when a slab was that cheap at the Bottlo?
$1.45 per stubby - bugger all really.
So head on out and grab the ingredients to do that special brew that you've been thinking of. You're so far ahead that it wont make a lick of difference in the long run.
BTW I dont recall ever going over $30 for a batch myself, but I got the base kit ( a Coopers Stout) on deep special from the Supermarket.
Cheers,
Greg