Good luck getting rental rights.
The very reason modern streaming sucks so much is that every other production company wants to be a streaming distributor; pulling rights from other streaming services.
Just holding a DVD does not give you the rights to lease it out. At least, that's if you believe the legal spiel on the disc.
It's possible the OP is from another country with slightly different IP law?
I don't recall if they said how many mailings a disc would typically survive, but they also had a lot of back and forth with the postal service to get a mailer that qualified for lower price postage, but they had to drop their cardboard insert that helped with longevity of the discs.
There were some series where the early discs tended to be broken, which made it harder to stock, especially if the sets were out of print.
Then you've got things like recent shows may not even get a release on disc at all.
But ultimately the publisher will stop selling new movies on DVD or Blu-ray, etc, so it wont save us.