Oof. That may be a little too much. You have the frunk space which doesn’t fit a large bag and in the trunk cubby, you can’t fit a large one either. So my guess is 2 large max? Possibly only 1 depending how “large” is defined.
I did 70% on front windshield and it made a heck of a difference. You’re correct that it goes unnoticed and it’s oh so worth it. Just not cheap. I got Spectra Photosync 70% and I think for front windshield alone it was $1200. I did all windows except the little ones above the FWDs.