Okay here's an idea that poped up in my mind in another thread (https://bitcointalk.org/index.php?topic=25883.0
Rent a flat in a cheap country, Bulgaria comes to mind since I'm in the EU (BG has a kWh of €0.0674/$0.089 for businesses, compared to €0.1019/$0.135 here in the UK). Fill it with racks and promote the equivalent of a Collocation where your customers can choose to either:
a) ship over their hardware and it will get hosted for a fixed price per month or percentage to cover for power consumption plus a small profit margin, plus maintenance/uptime (i.e. standard Data Centre concept), or
b) let the client configure a rig online up to their budget and specs and then build it and host it again for fixed price or percentage per month.
Now... remember you're in the business of hosting and not mining so you'll give them a better deal than miners and in return you get steady returns and a low startup capital (since you don't have to fork out for the hardware).
What do people think? Would you use it if there was a guarantee in regards to security, uptime and room temperature?!