Lights, please!
I think the important thing here has been mentioned. You can only compare the cost savings of the fermentables themselves. Extract brewers can buy hops from hopsdirect. Extract brewers can reclaim and resource yeast. Extract brewers can use the same water saving and water reclaiming sources. Or not.
And when it comes to the fermentables, comparing single unit kit pricing for extracts vs bulk purchases for grains is bogus. Extracts are sold in bulk too, and can come in at under $2/lb when purchased this way. Extract brewers can form group purchases to take advantage of this savings too. And dont forget the conversion factors for needed grain vs needed extracts for a recipe. Add the extra propane use into this equation and the savings are cut into considerably. Put any value on the brewer's time, and the extra couple of hours pushes the scales as all grain is more expensive.
Its not about money saved. Never has been. Thats a cover and a ruse to sell the need for new swag to the swmbo (its great for that, btw.

). Its not about quality. Nowadays a careful extract brewer can make great beer too. Its about control of the whole process, and to enjoy all aspects of the hobby. Its about being a personal brewery, duplicating many of the same aspects that the pro's observe to consistently produce the highest quality brews.
And thats what all grain is all about, Charlie Brown.
*takes blanket and walks off stage*