Either my post wasn't clear or ppl aren't reading it properly.
The $400k refers to monthly costs of an operation that mines 150 x 25 BTC in that period i.e. ~$1.5m @ $420, or a net profit of >$1m per month.
Re: halving, yes I can divide by two too.
so you really think that someone will sell to you a mining farm for a certain time frame, at a lower cost of what that farm will produce in this time frame? no way this is true
it's like someone do the renting at lower cost than the profit he would have made if mined directly his coins
Where did he say that? He said the monthly
running costs are c. $400k and then he is asking what is it worth? Presumably to buy or sell (or invest in) the operation.
On a different note I see someone above has questioned the numbers, I haven't done the sums but it certainly seems like a very low cost to run.
If he truly has it to "This equates to a total cost per coin around $105." then it's a no brainer. I would even think of investing if a number like that is true. I would want to see long term though with different difficulty changes. As we really don't know how long it would take to pay off a pretty big investment of 390k, as the 105 number should only be good for one difficulty period.
So it is still hard to speculate on many things.