For the KA SP, https://www.webstaurantstore.com/king-arthur-flour-special-patent-50-lb-flour/104NFL5105S.html , it looks to me like it would ship to you at $38 for one bag or $33/each for ten bags. If you choose larger quantities it gets even cheaper, but they’ll want to do common carrier shipping which is a pain to unload (because getting the good of the truck is your job and not the driver’s).
It looks to me like you could get King Arthur Special Patent? It’s slightly higher gluten (12.7% instead of 11.7%: https://www.kingarthurflour.com/pro/products) but I think it’s a decent all-purpose? Or you could get You could get high gluten flour, low gluten flour, and mix them depending on what you wanted to make? https://www.webstaurantstore.com/8935/bulk-flour.html
For the KA SP, https://www.webstaurantstore.com/king-arthur-flour-special-patent-50-lb-flour/104NFL5105S.html , it looks to me like it would ship to you at $38 for one bag or $33/each for ten bags. If you choose larger quantities it gets even cheaper, but they’ll want to do common carrier shipping which is a pain to unload (because getting the good of the truck is your job and not the driver’s).