When I did this for my (admittedly medium sized) collection, I used Booxter (https://www.deepprose.com/) and a cuecat scanner to catalog all those books.

Was a simple process of having enough boxes and labels, and I did that anytime I had some free time. Scan a bunch of books, drop them in a box, slap a label on the box, wait for booxter to find and fetch the metadata, update the label in booxter and repeat.

Will take time, but is easily doable.