Re: Black Arrow 28nm 100Ghash Bitcoin ASIC from $1.99/GH/s, miners from $2.97/GH/s
at that price, you would actually be better off getting 100GH of cloud hashing, and not pay the electricity for 5 years.
Problem with "cloudhashing"............you ARE paying for power,believe it!!
& you have NO hardware to resell 
that does depend on how you look at it. I only buy cloud GH using the BTC i've already mined, and the BTC I mine is in a DC with no power costs anyway.
For me, it's just an easy, quick means to bump up my hashpower, while btc price drops. Looking at the long term.. by the time the price of BTC rises again (don't ask me for my predictions, you won't like it!) I'll have accrued many! much! wow! hashpower compared to what I would have had if I'd saved to by more rigging.
but yes, it's more costly to buy cloud, depending on where you shop. And... a 100GH rig in 5 years time to resell?
I look every so often & I see no profit from "cloudhashing",unless you trade it...now your talking valuable time being consumed
If your holding mining equipment for 5 years,you missed "Mining ASIC's 101"
1-3 months max
Until network hashrate "parity" is reached...if that ever happens 
Cloudhashing is the only way in bitcoin mining to guarantee you get ripped off and don't see a profit.
Seriously I dare anyone to find a single person who has reached a positive ROI using any type of cloudmining.