I see that this is old, but I wanted to chime in. I am also planning to feed raw. There are some REALLY great yahoo groups about it which have really helped me. I have found that it's MUCH cheaper to feed raw than to feed kibble.
If you are feeding the low-quality kibble (Iams, etc) that later can backfire in health problems/vet bills. My dog died of cancer when I fed that stuff. I wish I'd known to feed better.
If you feed the expensive kibble (Orajen, Taste of the Wild, etc) then you are really paying $$.
Raw is VERY affordable in comparison. I am vowing to only spend under a buck a pound for the food. Many scraps can be found for very cheap or even free. You have to find some good sources and stick with that. Processing plants, Asian grocery stores, local butchers, etc are all great places. Friends who deer hunt will probably happily give you their scraps. It's all about learning where to find it.
I'm vegetarian but I think this is all a great adventure. I think it's the way dogs were really meant to eat. I've read that our pet dogs and wild dogs have the same DNA.
Oh yeah, and I really recommend the prey-model raw rather than the BARF. The prey model is all about meat. The BARF diet recommends fruits/veggies. I don't believe dogs would eat fruits/veggies in the wild, personally. Grass, yes. But are they out apple picking? I don't think so