One question is this rule in effect.
Wandering and Homeless
If no care is available, an insane character may become a wandering derelict struggling for survival. Such a wanderer gains no Sanity points unless he is able to join a group of the homeless and find at least one friend among them. To find a friend after joining such a group, the character can make a DC 15 Charisma check once per month. If a friend appears, the character recovers 1 Sanity point per game month thereafter.
For each game month during which an insane character lives as a derelict, roll d%. On a result of 01-95, the character survives. On a result of 96-100, the character dies as the result of disease, exposure, or violence