You could start as a ranch hand, especially if you know how to ride. You can work on both a regular ranch or on a “resort ranch” that focuses on tourism. You just have to find a ranch that has around that 20ish employees.
But then it would fit all of your points. You are spending your whole day with the same group of people.
Drifting between groups will depend a bit on your exact duties but no matter what you are going to get to know everyone and work with others occasionally.
New things are constantly coming up to do. Your duties also change with the season. And even if there is “nothing” to do you will still hang out with the other farm hands.
You have that authority over you in form of the ranch manager/owner.
Pay isn’t great but it might come with free lodging, then it isn’t that bad.
Your assumption of what the graph displays is wrong. Yes, it lacks a lot of information and the post could have clarified more.
But at the bottom of the graph you can see that the x-axis is years. Which is a strong indication that this graph displays the life expectancy of latin american countries. Whicha quick goolge seems to confirm. And it shows that El Salvador ranks poorly even amongst them. Since most migrants move to a country for a better life, the pool of countries that El Salvador can pull from is rather small.
But that obviously misses the point that many people who would move to El Salvador on using this opportunity either move there to help improve the situation for the average person. Or at the very least would have enough money to afford a better lfiestyle and not be affected by the average life expectancy. Which obviously is going to be low for a country that suffers from poverty and gang violence as El Salvador does.
So the “general” assumption of migrants moving to a “better” countries doesn’t quite apply here.