"In 2013 the Utah Housing and Community Development Division reported that the cost of emergency room treatment and jail time averaged over $16,000 per year per homeless person, while the cost of providing a fully subsidized apartment was only $11,000."[0] Obviously, the numbers will change with the area. The cost of an apartment in the Bay Area or LA would be much greater, for example. But the book makes a good case…
(I would guess a majority, but I have no data to back that. My expectations is that the transient homeless are not getting into trouble for the most part.)