All the equipment listed on the Equipment page could fit in a 30 by 20 foot room. Six people could work in that space.
Below is a floorplan for the Multimedia production area at Mesa Community College. The area shown represents about 1/3 of the space in the Center for Teaching and Learning. Not shown are the areas for the graphic artists, staff training and development, programmer stations, student editing, faculty consultants, and the director's office.
Notice that the tables holding the equipment have a walk area behind them. You constantly will need to get to the back of equipment. Never butt them up to a wall.
It's good also to have a sound booth. There's usually a lot of noise in these areas and it'll be hard getting clean sound without it.
Normal flourescent lighting is OK, but incandescent lighting that can be dimmed is better. Power is also an important issue. With all equipment running, you'll need about 80 amps spread out over 4 or 5 circuits.
Production is also sometimes around the clock activity. The workers need day and night time access to the area. When lot of money is invested in equipment, it should get maximum use. Most equipment becomes obsolete before it wears out. Having two or three shifts is common for large production facilities because it utilizes the equipment the most and keeps production moving.