Need Suggestions For Multi Author Ebook Store

Title.

This is what I have in mind but searching is only bringing up stuff I am not looking to do.

I am using ultimate member for registrations and profiles, and I am using wp user frontend for front end posting by members.

I want to add an option for the members who are published authors to be able to upload their books to the site, promote them, have a specific download link to the ebook file, use paypal to pay for the book, then be returned to the download page to download the ebook. That page needs to be protected so other people can’t take the link and continually download the book. The file and the page and the book should be restricted.

I am not looking for woo commerce to sell a bunch of books by one person.

I am not looking for woo commerce multi vendor because I am not dealing with payouts.

I want this to be a direct option. I will host their books, let them promote their books, they put their own paypal link on the post promo page, somebody clicks that link, purchases the book, the link they get is restricted or available for a set period or time to download the book once the author comfirms purchase on their end, and then that link expires or is otherwise restricted.

Is there anything that can accomplish this? And while I am not opposed to paying for it, I am not paying for anything unless and until I see how it works, with no limits or restrictions. I need to know it does what I need it to do or it’s not anything I would buy.

Any suggestions on what plugins are available?

Thanks!