I really only commented because the op in the thread seemed to be completely missing the argument of the meme, I'm not sure why that means i also have to solve Capitalism. But off the top of my head...

We could start by re-appropriating land, buildings, and housing thats is being sat on without anyone living on it, offer it to people who dont own a home at a fixed rate of some % of their current income, convert existing unused buildings to assist in the construction of social housing. We have the land, resources, and means to provide everyone with housing, it's just an issue of distribution. Ideally, you would be provided with a home that fits your needs once a social housing system has been fully established.