All extract / steeping grains, 5 gal batches, including bottle caps, sanitizers, etc. are costing me anywhere from $30 to $60, depending on ABV and amount of hops. Typical IPA running me $45-50 or so.
(I do work in a food/pharma lab though, so salts, finings, DI water, dextrose, nutrients, etc. luckily cost me nothing)
If I start buying 3-4 batchs' worth at a time, I might save a few bucks, but it doesn't really seem like there's that much bulk savings to be had with bulk extract buying. I could see saving a few bucks buying bulk hops.
Planning to start BIAB partial mash, which should shave about $5-$10 per batch. Dunno when I'll get around to all grain.
Also I should start harvesting yeasts, which would shave another $4-$8.
But heck, even an expensive $60 batch is two cases of some kick-ass, tailored-to-my-tastes brew that I ain't likely to find at less than $7.50 a sixer retail.