We've got three brick and mortar brew shops in Suffolk County. And the closest is still about a 50 min drive for me. Not sure if it's a business opportunity. I don't get the impression that brew shops are very successful. Most seem to stay afloat because of the wine crowd. I bought enough ingredients recently for 5 brews for around a $100.
I heard that Beerkraft over in Brooklyn might be selling brew supplies. Is that true? I know you can get great cheese there, but it's been awhile since I've been over to Park Slope and I don't remember seeing any brew supplies when I was there last (maybe three years ago).