LE builds Kodi with libdvdcss support. We are generally against piracy, but in the context of current trends the ripping of personal DVDs is a good thing even if your local laws are backwards enough to disapprove.
Yes, I have found that info too in the meantime: USB DVD Playback on a Raspberry Pi. It says, DVD playback (with libdvdcss) is a core feature for Kodi video in general. So, connecting a USB DVD drive should work. I'll wait for the results of admin Iridium to be sure.
I will not rip my complete DVD collection, that's too much for just watching one per month. If I could manage to do an NFS mount, that would be the most elegant solution. But I have to do some research first. I found this thread, and it's still unsolved. Any hints are welcome.