There are also elderly homeless that need help, have no families to take them in, no resources.
Yes, good point. I assume most of the elderly are receiving public assistance (Social Security or Disability) so they have some income, albeit perhaps only at a poverty level. I think mental illness and addiction are probably a greater factor in the homelessness of the elderly. Choosing to live on the streets of Las Vegas so one can use one's check to spend on an addiction comes to mind.