I'm sorry Pat but you are not quite correct in assuming that it is just having a place to live. Unfortunately mental illness may affect whether or not a person will stay in housing. The laws protecting civil rights of individuals have adversely limited getting very ill persons to take meds, if in fact there are meds that can help. Having several mentally ill family members, from experience I can say that there is no easy fix to this issue, but public policy is a logical start. I have struggled to navigate the bureaucracy to get treatment, aid etc. and the system does not work as it stands now.