I could see how power consumption could be a big deal for someone paying .2 or .3, but I don't think that most people pay that much, especially in the US.
{snip...]Or maybe all miners will relocate their machines to US data centres in states with cheap electricity (that'd be my preferred option).
But without data on how many miners pay a certain amount for electricity, you really can't know if there's going to be a "chilling effect" on the network hashrate any time soon.
How much does this cost?
I don't know yet.
Is it affordable to do this?
I don't know yet.
If so, how does someone go about doing what you described? (collocating I think it is called.)
I don't know yet.
What I would do is start by posting your request on a board in this forum. Find some well known long time and respected members who run or work at a data centre are willing to do what you're asking, and find out how much they'd charge per month. If you don't want to SSH in to manage your miners, find out if they'll manage them for you, and if so how much extra that will cost.
Then, once you have all the data, collate it into a table, and then pm me with it. Then I'll be able to edit my post and supply you with the details you're after
It's not that I'm lazy, I just haven't put an ASIC order in yet.