There's going to be continued support from local electricians, low voltage wiring vendors, various facilities service companies, HVAC, and now plumbers.. lots of plumbers. So many leaks. A site like this is going to have probably a few hundred full time people on site all the time in addition to the contracted folks.
A DC does not have a few hundred full time people on site 24/7, it's going to be less than a dozen. It takes much, much less people to run a data center than people think.