Either way, your point doesn't make sense.
If you are saying it IS a mental health issue, than pointing out how easy it is to find work and how cheap living is in rural areas has nothing to do with that point.
If you are saying it is NOT a mental health issue, then my counter arguments stand. Poverty is a cycle that affects even those with good mental health.
1. Cheap housing exists ($400-500/mo)
2. Minimum wage jobs are readily available in the areas that the cheap housing exists
3. Working a minimum wage job and living in said areas is preferable to being homeless
4. The primary reason someone might choose not to, or be unable to, take that path is mental illness
5. Therefore, homelessness must be a mental health problem
There are a number of ways to attack this, but "ease of finding housing and jobs" is actually relevant to his argument - namely, that because such opportunities exist and the homeless are not taking them, there must be something preventing the homeless from taking them (and that something is mental illness)
It was about mental illness.