Not that I can answer all your questions (most of them you can find answered on the forum), but this is one, I can answer
Some of the MD will have either a capture card or a satellite card, will it be good to have a satellite or capture card on the Core??
I would put all the capture and/or TV cards into the core. That is where they are suppose to life, and be utilized by whomever on the network want to use them.