One has to imagine that all of these factors discussed above and probably more have already been considered by previous owner(s), and the math(s) and economics run and rerun through the calculator.
So the question remains, can we, or could we, or should we take a gamble and take this a step further into the unknown and make a new breakthrough? I tend to vote yes on these things, usually willing by the same token to take it on the chin if things go pear-shaped.
We can buy a complete polished blade package with NBTHK papers, Koshiraé, Tsunagi and Shirasaya, but sometimes a little project and a flutter can provide a different type of entertainment.