When looking for new buildings, I always look for the maximum amount of existing infrastructure I can leverage. Old industrial sites and places that had/have heavy machinery are the sites I would focus on. Due to the electrical demand, sites like this almost always have a substation right next to them, then its all about power delivery. Buying directly from the provider is usually a bad idea, for the kind of power you are looking for you should contact an energy trader local to the area to see what options you have when it comes to buying the power.