Backup Exec Licensing- and Support-Questions

Hi,

i am new to BUE & just want to know how i would license the following infrastructure project:

3 x ESXi 5.5 

1 x vCenter 5.5

3 VMs running SQL 

30 VMs i will backup via Imaging (VMware API for DataProtection aka VCB)

and and on 3 Guests i want to make consistent Backups with SQL-Agent.

1.) Order Question: What will be the license model?

2.)Tech. Q: Is the challenge to get application consistency also made by image backups? and i only have to license the feature?

or will always an active sql agent/online agent be needed?

3.) For the rest of 27 VMs do i need any kind of backup exec agent to get and browsable recovery file catalog or sth?

or is it enough to backup the images and the index is made by the vadp-backup-process?

Thanks in advance for your assistance.

Lucas