White can be made gray easily on a background...but when white paint it comes right up underneath the feet, then it is white...so every single shot requires masking and knocking out the backdrop...a gray cyclorama wall could easily serve as a super-easy green screen substitute for group photos. Gray is so easy to select and knock-out that, if you have this massive space, a white cyclorama and a gray one would really be sweet! A white wall is a wall, but a cyclorama is not a wall, it's something else.
I would have some white board/teaching area with a projection screen, digital projector, laptop on stand setup, desk for presenter, desks or tables for students. Rolling cart with computer for tethered shooting. Rolling refreshment stand for beverages, glasses, drinking cups, coffee carafes, tea dispensers, ice bucket, cooler (poly, like Coleman or Thermos brand for canned beverages), napkin/silverware/plate setup.
Tons of lighting gear...boom stands, counterweights, plenty of honeycomb grids for parabolic reflectors, mylar diffusers for the parabolics + grids. V-flats and reflector boards, but also a good supply of nice panels (scrims) and fabrics. The usual assortment of other modifiers. Plenty of lights with 50-degree reflectors, 110 degree, etc. About eight lights I guess.
I would put in a very nice "kitchen" with an island, sink, refrigerator,stove/range/cabinets for not only making coffee and snacks, but also for using in shoots as a kitchen set. Reception area, waiting area. Restrooms. Dressing rooms. Makeup stations. A person could easily sink wayyyyy too much money into this.