Do you have lots of cash to support the copyright and maintenance fees? The Web archive (I think, or another similar website) got sued for having knowledge and book contents on their website. You can't just publish hacked books.

Most likely you would need a way to generate money for a "business".

There would be some ways like advertising (can be OK, but not always the best, it depends on how many adds, how scummy ads, and how much tracking/data selling).

Donations? = pretty much no expected revenue. The amount of revenue you can get is very low.

Paid features, but what features could be paid while keeping free access?