Enough already. This society can provide Walden (by Henry David Thoreau) sized accommodations for all that need it. There is no reason for anyone to be homeless.
People need work and healthcare. These are rights not a privileges.
Except... some people choose to be homeless. There are two in this very thread (the first comment, and here: sandiegohomelesssurvivalguide.blogspot.com). It's unpleasant to say, but it's true.
To achieve a goal of 100% home-d, we'd need some REALLY draconian measures, e.g. forcing people into homes they don't want and forcing people to take medication against their will. I, personally, am not for measures like that, for reasons this blog post lays out well: http://slatestarcodex.com/2016/04/27/book-review-albions-see...
However, the goal to reduce homelessness to 0% for the vast majority in the set of people who WANT a home is one I can support - even better if that desire extends beyond white countries.
People need work and healthcare. These are rights not a privileges.