Something like that would work well, assuming it was sturdy enough to support the weight. That's something like 200 lbs if the pot is full of milk. You may want to consider another fuel source, though. A natural gas pipe is easy to extend and use a flex hose for the hookup, or you can use cheap 1-lb propane cylinders if you want something portable. Butane burns hot, but I think it's rather expensive compared to propane.