Snipped post to save space.
Well quoting a poorly regulated, low efficiency junk PSU, unknown radiator as a substitute for complete sealed waterloop in China using dubious prices (excluding freight to US) doesn't really help your case.
Still lets use your imaginary parts:
Junk PSU: 4*10 = $40
Imaginary complete sealed watercooling system: 3 * $20 = $60 (w/ pump, radiator, lines, waterblock, shipped ready to install yeah right. you pointed out a radiator is $12. Show me where you can get a pump, reservor, tubing, connectors, copper waterblock, and assembly for $8 more).
Case: $6 (you don't really believe the listed price on alibaba do you. Ever asked for quote on a specific model? Suddenly the $10 special disapears marked up 300% or more)
Fans: 8*$1 ea (its 8 not 2 2 per radiator plus 2 exhaust)
So that alone using these (and you have to admit) dubious prices and components is $74 before shipping from China.
Your projeciton was prices as low as $50 per TH/s thats $60 per Sierra and you are already overbudget even if we assume your price list is real. Your already $14 over budget and that is with no ASICs, minor pcb components, pcb manufacturing, pcb assembly, major assembly, and testing. This also assumes 100% yield.
Like I said my guestimate of $1000 per system was just a start. I even said you likely can cut that by 50%. That is a huge difference from saying you can cut it >95%+ to meet some 650 PH/s estimate.
Thanks by your own junk part links you just disproved $50 per TH/s nonsense. You know it and I know it you just can't admit how utterly silly your projection is. Hell you can't even get the basic non electronic components (power, case/frame/rack, cooling) for $50 per TH/s much less the entire system.
IM not interested in pricing a Sierra. Frankly thats as silly as doing a BOM analysis on a minirig with an integrated Nexus 7 tablet to make a point that prices per GH couldnt go below $15/GH. Bare bones "designs" that asicminer and bitfury put out, is what future miners will look like. No fancy cases, no water cooling, no integrated tablets, just cheap as chips boards at most in a very basic box of fans. What HF, Cointerra etc are putting out soon is pretty darn nice, but at the prices they can ask for these rigs, there is no reason not to. But in 6 or 12 months when margins evaporate, water cooling and seasonic PSU's may look as silly as an integrated tablet in a minirig today.