Firstly, I drink for the alcohol. I love beer. I love pairing a great beer with a great dish of food, or getting just the right beer to refresh me after lugging the groceries up two flights of stairs.
But the benefit is the buzz. I sometimes drink to get smashed too.
I appreciate a great drunk and I appreciate a great beer. I don't think there's shame in getting drunk, and while I don't mean to call doubt on to anyone here, I think more people drink for a buzz than readily admit on these forums and there's NOTHING wrong with it. Homebrewing and drinking harms nobody, and helps build community, so it's all good.
As a brewer, I've wondered how to cut costs here and there. In addition, one of the challenges I put myself against is making the best beer I can for the least amount of money. To me, doing that is NO different than attempting to make a dead-on clone of your favorite commercial ale or lager, it requires understanding of the brew process, your equipment and your ingredients and a brewer can feel damn proud of a success in that arena.
For a really simple and cheap drunk, check out apfelwein. It's high ABV and pretty cheap. If you're looking to stay with beer, I've done that math and found that bulk grain buys are about as close to "cheap" as one can get unless you happened to have married the heiress to a maltster fortune. The "buying from a local brewery" might count here too, since they're getting volume discount for sure.
Check Craigslist for equipment before hitting your LHBS.
And finally, don't ever forget that brewing is supposed to be a hobby, not a means to an end. You really can purchase crappy beer cheaper than brewing your own (merely on the volume purchase benefits) so never forget that brewing is supposed to be the fun part of the process.