In the UK I have been using Speedibrew Celer-41 powders. These I bought 10x1L kits for 70, which will do me for 80 rolls of 120 as a one shot. I could probably double that if I dare in the Jobo but havent chanced it yet. As stated before its the dev that will turn, a fresh mix is quoted as lasting 3-4 weeks in a sealed glass jars, as powder its indefinate. The Blix on the other hand will last for months when mixed so there are no problems there. I would be tempted if you can to source the dev as powder, I know Speedi will do batches to customers requirements so can't see why you couldn't source something similar in the States and buy the BLIX in bulk, which I believe to be the more expensive component.