Your "projection" was "based" on Hashfast cost.  It was at the top of your chart.  When asked to back it up you say you aren't interested.  Didn't you ALREADY do such an analysis before coming up with $250 to $50 per TH/s or were those just random numbers you made up?

Still $50 or $100 or $250 per TH/s is just as utterly silly for any vendor, any design, any configuration, anywhere in the world.  It is like saying you will make a clone of an iphone.  Can you do it for $100 maybe, maybe not but if you come in here and say you can mass produce iphone clones for $3.20 ea well it is just laughably dumb.

IIRC the power converters on Bitfury board are about $12 that is in bulk (i.e. 1000+ units).  Just the power regulators are $12 for 40 GH/s. = $30 per TH/s just for one non ASIC component.  Avalon board level BOM is open source (very similar to ASCIMiner who is very hush hush about components) and runs ~$10 per board (excluding ASICs, PCB and assembly).  That's $50 per TH/s for just minor components (crystal, resistors, capacitors, connectors, etc).

You can't get a pcb (no case, fans, cooling, heatsinks, power, host, etc) for the prices you claim even with free ASICs. Just once again to illustrate how silly $50 per TH/s is.  You say Bitfury is the answer to lower cost, at $50 per TH/s that is $2 per board for the overclocked version with higher output power regulators. All PCB production cost, all components, ASICs, assembly, testing, yield losses, etc.  $2 per board.   $2 a board for a 5" by 6" PCB with over 100 components.   I mean it is hard to point that out with a straight face.  Even if your board was $2 power, cooling, open racks, etc have a non-zero cost.

You say quality power isn't important but even at $500 per TH/s & $0.08 per kWh power is about half of the total one year cost.  Using 70% efficient PSU means 30% higher energy cost so robbing Peter to pay Paul.  The junk PSU you listed have horrible voltage regulation and were never designed for high current electronics so what happens when your piece of junk PSU destroys your ASIC.  Is that in your $50 per TH/s target?