I think you misread the PC cost.
It's $1600.
or $3200 for 6 Mh/s
Or $500 for an additional 3 Mh/s
In other words even with the 13% lost profits from the additional power requirements 2 PC units would bring in about 40% more profit for a 15% base cost increase.
Not a good buy, and that's before considering non mining resale value.
Then as I pointed out before, perhaps the people that do not need to save money on electricity would like to be directed to an operation more to their liking.
http://alpha-t.net I am sure their products will meet your requirements.
You aren't saving money on electricity when the cost of your product requires multiple years of use to show it's benefit.
Running 6 Mh/s at 2000 watts for 1 year results in 681 LTC at a power cost of $2100.
Running 3 Mh/s at 50 watts for 1 year results in 340 LTC at a power cost of $50
681 ltc @ $19 is about $13,000
340 ltc @ $19 is about $6,500
If we remove power costs and additional startup costs of $500 our 2 PCs earned $10,400 or $4,050 more than your ASICs provide.
In order for your asics to provide any real saving power would need to cost nealy 40 cents a KwH.
Your device needs to sell at around 60 cents per KH/S in order to be attractive from and earning stand point.