Web Server - File And MySQL Backups

how to achieve the following:

We have a dedicated server, on which we hosts about 15 sites. I am needing to:
Backup each site individually (all files)
Backup each Db associated with each site
FTP to our own in-house ftp server

I have been searching around all afternoon, and possible solutions to each point above are the following:

Iterate through each top level folder in, say /var/www/vhosts/ and tar each folder individaully

I have only been able to do a mysqldump the whole server, and have only found scripts into which you have to manually specify each db if i need separate backups for each one done

Not an issue, we currently have backups from a separate server running

Is it possible to set this all up in one, top-level cron job?