Homlessness in France

There is nothing worse I can forsee as an adventure to a foreign nation cut short by the chains of poverty. Created for any number of reasons. Poor choices. Lack of networking. Unawareness to a larger picture. As someone who intends to forge a destiny of adventure by means of travel, I am curious to know what the life of a vagabond might look like. How are they generally viewed and treated? What resources might such a traveler have access to? How can one escape the fate. These are questions I have due to my own experiences here in Denver, Colorado, USA. Nothing can stop me from my decision, but i would like to know what should be a means to this end, should the worst happen.