If you have a spare 16k, that amount of time on your hands (which is months for just one person) and that level of skill across so many disciplines (binning, overclocking, CAD, machining, sleeving, bending and above all just planning PC's on this level) then you definitely should be doing it yourself. Aside having 16k I fall into most of those categories and I can tell you when/if anyone gets to that level, it's no longer about owning the PC and saving 8k is just irrelevant. As much as I agree with you and Ian simultaneously there is nobody who can do this who would want to own it so justifying the price is pretty meaningless to that end.
JR