So what you're saying is that if you start with the thing in this article, and then want to upgrade to the thing you described, don't expect it to cost $9k, it'

So what you're saying is that if you start with the thing in this article, and then want to upgrade to the thing you described, don't expect it to cost $9k, it'll cost $10k :-) (and as a bonus leftover: a nice machine to donate your local volunteer hackerspace, youth tech center, school etc etc) I don't see the problem, as long as it's roughly 9-10x faster for an embarrassingly-parallel task of larger size, that 10% isn't going to make a big dent, is it? :-)