i only wonder how much money you guys save...
A loaded question indeed.
Exhibit A: 5 gallons of hard apple cider costs me roughly $28 per batch after my initial equipment purchases... This breaks down to approximately $0.52 per 12oz bottle or $3.17 a 6 pack. This is cheaper than anything you're going to buy at a store worth a damn, period, and is always around 10% or greater ABV
Exhibit 2: 5 gallons of gold medal winning peach wheat ale (which I think tastes better than any wheat ale you find on the market) costs just about $70 per batch, or $7.92 per 6 pack. By comparison to most top shelf local beers I'm still saving a few cents per 6 pack I'd buy at the store and is always around 7-8% ABV.
Exhibit F: 5 gallons of pumpkin ale, which has the most ingrediants to date ran me about $110 bucks when it was all said and done for supplies. Roughly $12.45 per 6pack. And around 11% ABV.
Your standard Budmillercoors 6-pack is going to be $5.99 or so, right? $10.99 a 12-pack, and $17.99 for a 30-pack.
Bang for buck commercial grade piss water ends up being the cheapest, flavorless, get drunk and bump n grind liquid on the market. However, when you scale up to a micro-brewery scale, and provided you enjoy your own beer, you can't beat homebrewing for price and quality. Also note the ABV on the examples above, it'll get you drunk if you want, and easily at that.
Most people who start homebrewing for the savings eventually start brewing for the quality instead regardless of price, but as you saw in my examples above that doesn't always mean you're not saving money from the commercial stuff, and in some cases you are absolutely not saving money, but you're making a really kickass beer.
I like to think of my equipment purchases as investments. They may not be paid off immediately, but after all the brewing I've done and money I've not spent on commercial stuff, I'm relatively certain it paid for itself in a year. Oh yeah and it tasted way better than budmillercoors.