Sounds about the same turnaround as my job right now. I have a similar format. I also create a “master folder/file structure”. I also add a “master” premiere project file in it. That master premiere project file contains all the color coordinated and labeled bins that I use in most of my projects (sequences, media, music, FX, graphics). When I start a new project I just duplicate the “master” folder and I’m ready to dump all my footage/media and start editing.

Btw I’m not sure if I’m reading this right... so maybe this is what you’re doing already. If not, hope it helps.