Save published form as a pdf for Archiving

When a form reaches a specified state (e.g. complete/inactive), I would love the ability save the currently published form as a pdf for archiving purposes.

This would allow old fields that are no longer in use to be removed, despite containing data, as the information would be stored in the pdf and cover any records management rules we have (e.g. store records for 7-99 years).  It would also help reduce database size for larger client systems.

This solution could potentially be triggered by a workflow, look at the number of the published form, and store data by Tab, Section and Field (visuals don't need to be pretty, just neat and readable).