That looks like a nice size building with a nice cement floor,The real beauty of silver alloy is it's ability to stick to carbon steel as well as many other non-ferrous metals. (stainless, copper, brass, nickle, chrome etc)
Like I said previously,"If'n I could afford to use gold, I would sure give it a try".
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Using silver really isn't that expensive, a couple ounces go a long way.
Sure a tig is pretty much the holy grail for welding on chainsaws, but we all don't have the luxury of owning one (nor the skill,,,,,,,,,YET)