In Adobe Bridge I import and simultaneosly convert to dng and delete original files and need no scan to folders.
Adobe Bridge also doesn't create a catalog/database. It simply views the files in the folder that you ask it to view. Photo Mechanic will do this by opening a Contact Sheet from the Navigator, as opposed to viewing items that have been added to the Catalog by using the Organizer. Here is a link to show you the difference between the two:
https://camerabits.freshdesk.com/support/solutions/articles/48001077444-how-to-find-your-catalogs-using-the-organizer-panelFurther, Bridge has the benefit of being made by the people who created the DNG format, where as, for the purposes of creating DNG files, Photo Mechanic can really only do what Adobe DNG converter allows us to do. Unfortunately, while Photo Mechanic can call out to Adobe DNG Converter and request it to create DNG files from a given set of RAW files, it doesn't provide a way for Photo Mechanic to know that those files have been successfully created, and therefore we can't automate adding those items to the catalog.
What you can do is use "Catalog Sync" instead of "Scan to Catalog":
https://docs.camerabits.com/support/solutions/articles/48001161171-catalog-syncYou can set Sync to "Quick" mode and therefore it will only look for new items in the folders it is Syncing, rather than scan every file even if it is already in the catalog. However, it is not going to remove the original RAW files from the catalog, and due to the aforementioned limitation of not knowing when the conversion to DNG has completed, it is not likely that we would be able to add that automation in the future.
With all that said, I'd be happy to set up a time to screen share with you and perhaps find a way for you to streamline this process if the other benefits that Photo Mechanic offers are intriguing to you.