well I can tell you to sell enough mufflers to pay for a tig setup at these prices would take a very long time and a lot of mufflers, My tig was 1500.00 plus the gas 30.00 every few mufflers , welding rods don't remember the price per #, stainless brushes every so often, tungsten 3.00 each plus collets for every size, lots od electricity, acids to clean the mufflers the aluminum to make them with .saw blades to cut the aluminum and the list goes on , so there is not much profit in them alone. I have lots of time and no money so I don't have to do it for profit it is a hobby for me but is nice to make enough to buy more material to make some more.