It's actually as simple as this: (1) soak barley in hot water (2) boil with hops (3) put into bucket with yeast. No way. That's it? Well, yeah, of course it's a bit more complicated, but I must say it's a very fun challenge and learning experience to make your favorite IPA (my favorite is Two Hearted Ale, what's yours?).
But how much does it cost? That's what I wanted to know before I started. For me (I was very minimalist with everything), it all averages out to $5.88/six pack (compare Two Hearted @ almost $10/six pack). This includes all the equipment I ever bought, so it actually goes down with every batch I make.
If you're interested, we have some good books. Also check out the K.L.O.B. organization in Kalamazoo. Also, youtube "extract brewing," then "partial mash brewing" then "all grain brewing" to get an idea of the different ways to make beer (it depends on what sort of equipment you have or want to buy).