Was at the local Costco today, they had KAF AP in a 12 pound bag for $5.99, or around 50 cents a pound. This is the first time I've seen it there and the first time I've ever seen a 12 pound bag. The only problem is the container I usually put it in just barely holds a 5 pound bag.
I, alas, live in a Costco desert, so there is no point in having a membership.
I own a couple of the 25 pound flour containers that I bought from KAF back when they were shipping 25 lb. bags of flour. I used to keep them stacked in the kitchen and fill smaller ones as needed.
BA, are there restaurants near you? You could befriend them, see who they order from, and maybe they would help you out. I've been very fortunate that way.