Stainless steel yarn? Seriously, if they go that fast, I'd head to Walmart and buy a pkg. of Hanes or something. That's a lot of effort to not last. There was another thread about the same kind of problem some months back. I think the OP of that one decided to buy socks already made. I've seen something about socks made with a replaceable sole, if I can figure out how to search for it, I'll let you know what I find. Is there any possibility he might wear slippers over his socks?
Happiness is catching that dropped stitch while it's still fixable..