Just spoke to Harris Industrial Gases in the nearby suburb of Roseville. They will sell a 50cf or 80 cf cylinder or rent a 150cf. Renting would be in the range of 40 cents a day with a deposit. They say they are trying to get away from renting smaller cylinders. The price was $229-259 to buy the smaller sizes and $25 ish for a fill.
1 cf = 28 L (which is not far from the 27 I guessed, a foot being ~30 cm). So 80 cf ==> 2.5 hours of burn time with the aforementioned glass torch or 7.5 hours at the same flow rate as the concentrator
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Genesis 49:16-17