dj kaka - this is not a project you can easily attempt, there are many many pitfalls, and you need some pretty serious professional grade equipment - and know how to use it to get this sort of setup installed & working successfully.
Again I respectfully suggest you get an expert in as any attempt to hash together a hobby grade solution will almost certainly end badly one way or another.
Of course theres no reason why you couldnt do things like the cable runs to the central video cabinets and just get the experts in to just set the electronics up.