I'm in the same situation, and have a low budget for backup software so I looked into a few alternatives.
Quantum VMPro - free up to 1Tb of protected data, data can be stored on their DXI V1000 VM appliance which dedups data up to 1Tb for free. Quite a good product, but gets expensive if you go beyond the free limits.
Trileads VM Explorer - $700 for site license, works well with our DRS cluster but doesn't do incremental forever - a full backup is required every few incrementals. Seems to be very stable though.
Thinware vBackup - free but is in beta stage, perhaps one to watch in the future.
Veeam Backup free - free, but doesn't do scheduling.
Anything else is licensed per socket/host, usually about $1000 per license.