Unless you have a shop close by that refill on the spot, it would be better to do a swap. Try to find a used one on craigslist. I think it is cheaper to buy an empty tank online then refill or swap it, should be cheaper than getting one from a welding shop. Also you can pay a deposit to the welding shop and just do the swap until you no longer need the tank, then return for your deposit. Check with your local store. I did swapped my shiny tank for a not so pretty steel tank.