Easy reporting/alerting of the largest files and/or folders on a server

As a Web hosting provider, I'd like to be able to quickly and easily see a report and/or notifications in WHM of where the largest files and/or folders are located on the entire server.

In order to maximise the profitability of a hosting business, it's important not to have very large files (often tar.gz files) and/or folders (e.g. millions of log file records) on a server. And yet this can on occasions occur, and might get overlooked for a very long time, causing unnecessary server costs, and potentially additonal backup charges.

For extra convenience, the same report in WHM might give me the option to delete the large files, or clear down the large folders (with lots of 'are you sure?' warnings.