No code web app builder

We are looking to develop an online legal library using bubble or another no code builder. Users should be able to search for and view different content types (books, laws, cases, journals, blogs) and the library should be modern quick to load and scalable (able to host millions of documents). There are some other features I need aswell such as sso, different packages, user types, document versioning etc.

Looking to commence this project asap, so please reply with approximately how long it'll take you complete such a project and share any previous complex no code web apps you've built. Thank