2,000 books is a subset of your library...?
You can get help for that, you know
I can't even imagine being able to read 12,000 books. Even when reading a book a day (which is quite impossible for most people because of work or other commitments, let alone reading speed), it would take you 32 years to read every book.
My library now contains 971 books, of which somewhere around 60 Delphi Classics, and it already contains everything I ever wanted, possibly wanted, maybe wanted, or very remotely wanted. I only add some books now and then on recommendation. Even with 'only' 971 books, I don't expect to read them during my life time, except if I can still use these EPUB's after my retirement, which will take another 32-33 years (with current rules and regulations).