Yeah, it's a driver's license that's a privilege not a right. Own all the cars you want. Create a car museum if that's your thing and you've got the funds.
But behave if you want to actually legally drive any of them.
No license is required to operate a vehicle on private land... it is only on public roadways (which are public land) and public accomodations (privately owned parking lots that are publicly accessible) that a license is required.