Sgtonory, The burner that you are looking at, partnered with a homemade smelting pot like Shadowcaster made should make a good setup for you. That and about a half dozen ingot molds. Natural gas would be cheaper to use, if you can get enough heat for a good melt. If you plan to sell any lead, an ingot that fits tightly in a flat rate box and that will also fit in a 10# pot is the way to go.
There are several threads and even stickies here about smelting lead. Lots of good ideas, too! Lightman