Great article, but I didn't see (maybe I missed it) a notice of the fact that homelessness can be correlated with meth, mental illness, etc. with the causation

Great article, but I didn't see (maybe I missed it) a notice of the fact that homelessness can be correlated with meth, mental illness, etc. with the causation working in either direction. Homelessness could be caused by, or increase the chances of, any of those other factors (or both).