Physically demanding, emotionally draining, would be nice if you could get a little more pay and work fewer hours. A 12 hr day is really too long for this type of work and not healthy for a person to do more than 30 hrs a week. It does take it's toll over time as well. They excel at what they do and do it with sensitivity and grace, but it's a calling. You're not gonna get rich doing this work, but you will leave every day with a sense of satisfaction that you made a difference in the world today.
You do something that matters in the world.