Thank you for the response.
I was looking at the SQ14 burner also. It seems to have 1 advantage over the SP10 - it can produce a lower flame and thus use less Propane, such as when you want a low boil - when you don't need 185,000 BTUs.
Some have said the SP10 runs through fuel fast, but maybe they have the flame too high? I don't care about a wasted 75 cents, its more the hassle of having to swap the tanks and refuel.
For boiling 5 gallons of wort (60 minutes), how many sessions do you get out of 20 pounds of fuel?