I alternate a commercial raw diet with meat form the butcher, usually stuff marked down because its best before date is getting close. This week i gave them turkey wings, chicken thighs, chicken wings, and chicken back, beef liver, some whole fish, ground beef and tripe.
Here is a list of commercial diets from another forum, some are less expensive than others:
http://www.justlabradors.com/forum/inde ... 347.0.html
And a list of foods that people have tried:
http://www.justlabradors.com/forum/inde ... 356.0.html
I try to go to a butcher shop or farmers market over a standard grocery store, you get better prices. Most people can have their food average out to under 0.75-1$/lb. I have a butchers that will set aside the breast bones and attached meat from when they debone chicken breasts, i have them add some more meast to make it 50% meat/50% bone and grind it for me, cheap since its half scraps.
There is a tonne of stuff you can read on the internet on various permutations of raw, and I am by no means an expert with making it balanced, which is why we use a commercial ground product for 50% of their meals, so i know at least part of it is balanced.
One tip, its its all chicken based, your dog gets iron deficiency. If its all beef, you get vitamin A deficiency. You have to include bones, either whole or ground to watch calcium and ohosphorus ratios. Also tripe is usually super cheap, since its a scrap meat for a butcher, i have a guy gring it and freeze it in 3 lb bags.