For this type of solution, you'll probably want to get away from using the command-line client as it can't be invoked remotely using the SQL Backup management console. The Professional edition is the highest edition, and it allows you to manage backups and restores remotely. You can add as many servers into the SQL Backup console and group them by location.
Using the SQL Backup console this way, you will use the console to send backup commands directly to the SQL Server, which will get the SQL Backup server components to do the necessary work.
If you have any more questions, please let me know.