[anamax]

The hard part is NOT building such a site. The hard part is getting users.

It's almost impossible to get funding for something like this without first demonstrating that you can get users where "demonstrating" means "already has a lot of users and, more important, growth in users". (There are a few people who could get funding for this project before such a demonstration but those people wouldn't be asking this question on hacker news.)

[jasfi]

You could use nocode to build a prototype, use that as the platform to get initial users, then get funding and rewrite with code as the userbase grows if the nocode solution can't keep up.