An enclosed structure located where you're describing would be under incredible pressure from the water above, unless it's close to the surface. Also you would

An enclosed structure located where you're describing would be under incredible pressure from the water above, unless it's close to the surface. Also you would need people to man it. They wouldn't last long without sunlight. Finally, hard drives, switches, and other items fail all the time. You would need a storage area for food, water, shelter, and replacement gadgets, as well as toilets of some type.