Thanks John for your remarks. All good comments. The proposed hierarchy would be 150 VM's with one instance on each VM. So, the issue with multiple instances on one VM is a moot point. My opinion is that it is overkill, but the points you regarding resource control is exactly why they are proposing this methodology. Also, when we migrate to a specific application (new and/or updated DML/DDL) the rick is mitigated to just that one application.

Thanks!