Who's Funding These People?

 I was thinking about the millions of migrants coming to this country from throughout the world, specifically, from nations in Central and South America. Where do these individuals get the money for their travel? I sometimes find it concerning to come up with gas and food money when I travel to see my son in Kansas. Somebody or some countries have to be forking over the cash for their journey. https://www.dailymail.co.uk/news/article-12862539/Migrant-border-crossing-video-trian-Arizona-delays-illegal-crossing.html