Joie Andrew (5/27/2015)
I think Perry's answer is perfect. As far as the maximums for instances all editions of SQL Server support up to 50 instances on a single machine.
SQL Server supports 25 instances on a failover cluster when using a shared cluster disk as the stored option for you cluster installation SQL Server supports 50 instances on a failover cluster if you choose SMB file shares as the storage option for your cluster installation
... from the same link you posted.