I am ready to start testing NSM, mainly for management of home
directories but I cannot seem to find anything about the network
design/requirements for this product. I can see the install guides but
nothing about server requirements.

Do I need a dedicated server for this or would it be fine on an existing
OES server?

How much RAM etc does it need?

How many servers do I need? We have about 3000 users currently.

Does the server(s) need a replica? I really don't want to add more
replicas if it can be prevented.

Is there a best practices guide somewhere?