OK, so I got a turkey fryer. Propane. 36 quart. I modified it to try and use Natural Gas. Sorta worked, but wanted my pot to be afraid, very afraid. So I bought a Natural Gas wok burner that blasts out 125,000 BTU of heat. Holy mackerel! Blasts out heat now. The ring around the burner (Sheet metal) gets red hot, and getting close is uncomfortable. Mission accomplished! I'm still testing, but about 4 gallons was at a roiling boil in ~15 minutes. Happy.