How many machines do you want to protect (with AV + FW + HIPS)?
If you would like to protect 3 machines (am assuming you have 3 users in home office based on info provided below) you might want to install and configure Comodo Internet Security (CIS) on each of these to enable protection.
ESM is recommended for central management of endpoints for more than 10 -20 machines due to the setup / administration involved. For non-central management OR less no of endpoints CIS might be recommended.
Am not sure what exactly do you want to backup / need help with backup?
MS Windows Home Server provides a backup mechanism - http://www.microsoft.com/windows/products/winfamily/windowshomeserver/protect.mspx
In addition Comodo provides the backup solution which might be downloaded from this link:http://www.comodo.com/home/data-storage-encryption/comodo-backup.php