Rules/Proportions for Topology

1. Our example for the course is a single orderer node from the OrdererOrganization. Now in production environments the orderer node number & Org number would most likely scale up based on availability requirements.

2. As I mentioned before a good basic recommendation for all CA's is to have each organization have their own respective CA.

3. Just for yours and everyone else's knowledge, a lot of what you're asking are tasks more suited for the Network's Architect. Especially the peer per org question, which is really more of a case by case basis, and not a hardline answer. If these are your most important concerns, I recommend you take an architectural class as well to supplement your understanding, or go deeper into the fabric documentation (it's come a long way, believe me!)

Happy learning!