First, it's cheaper than any of the alternatives. From the NEAH, a paragraph describing those savings:
> Finally, permanent supportive housing has been found to be cost efficient. Providing access to housing generally results in cost savings for communities because housed people are less likely to use emergency services, including hospitals, jails, and emergency shelter, than those who are homeless. One study found an average cost savings on emergency services of $31,545 per person housed in a Housing First program over the course of two years.xii Another study showed that a Housing First program could cost up to $23,000 less per consumer per year than a shelter program.
Next, it's just extremely effective. Being homeless over any period of time negatively affects mental well-being. The longer that you are homeless, the worse this gets, and the harder it is to get out. Housing first isn't just the cheapest solution, it actually solves the problem of homelessness directly and helps people to heal their mental state. You can find this information all over the place.
Ultimately, we should have rapid housing-first policies for everyone who ends up homeless, but that will require the American public to give up our normally punitive cultural attitudes so that the data can win, but we haven't done the best job ending other punitive systems despite their total failure, like the war on drugs.
Quote is from: http://endhomelessness.org/wp-content/uploads/2016/04/housin...