Stephen you are talking a few million to build your own DC.

Then theres the per annum costs for connections to the backbone and you will need more than one connection in case one provider fails. Thats going to run into many thousands a year.

So to break even you are going to have to have one hell of a lot of servers and one hell of a lot of customers.

Then there's the staff wages as well.

I don't think this kind of venture is for the non risk takers.