Hello, I am currently managing a hosting location for Bitcoin mining rigs in the US.  Most importantly is going to be power and your cooling.  A standard office building will not likely be able to handle the power load or amount of cooling you are going to need.  We are hosting Avalons currently and we have had to spend quite a bit of money on unit upgrades in order to provide the necessary amperage and several tons of cooling.

You also need to look at the cost of electricity.  These ASICs eat up quite a bit.