I would look at your long range plans of smelting lead. If all you will be smelting is 200#, then I wouldn't invest a lot of $$ on a burner and pot.
I've been smelting WWs and other lead for cast bullets since the early '70s. Somewhere in the mid '80s I bought a shotmaker and began to also make my own shot. For about 20 years when I was shooting registered Trap and later Skeet, I was making about 700 pounds of shot per year.
Up until this year, I smelted all of that lead in a 10" diameter x 3" deep cast iron skillet on a Coleman stove.
This past summer I bought a propane burner in a cast iron stand and a hose and regulator from my propane supplier for about $50. I think this burner is a 35K unit, and it works good.
Garage sales and Goodwill stores often have cast iron pans and maybe even a propane burner for substantially less $$ than they sell for new.
SAVE 200 ELK, KILL A WOLF
NRA Life Member