HA and DR

We need to implement SCVMM in our environment.  We are looking to utilize two-2 node SQL Cluster as the database.  We have requirements for Highly Available and Disaster Recovery Tolerant solution and have following questions:

1.  Is it possible to have HA and DR of SCVMM Server Components?
2.  If so, how many minimum servers would be required for HA Setup?
3.  If so, how many minimum servers would be required for DR Setup?
4.  If so, what would be recommendation with respect to Instances? Separate instance or Shared would also work?
5.  What would be bare minimum hardware recommendations for a small to medium size organization? any sizing help would be great help!
6.  If possible then what should be considered while implementing this solution?
7.  Is HA and DR really necessary for such systems?  Is it a norm in the industry?
8.  If we do not go for HA and/or DR, how much recovery time is needed in case of a single server?
9.  Any link to article/blog/website would be appreciated?