> I suspect most who go by YIMBY would also oppose this.

Well I'm not sure what you're proposing but if it can be characterised as "mass public housing" it sounds like a terrible idea on the face of it, and most people would probably oppose it on that ground. But the YIMBYs would have to agree that you're allowed to try it if you want, otherwise they'd be NIMBYs, on the basis that they are telling other people they can't build on their land.