I finished high school via a scholarship program at an international boarding school in Wales. My houseparents are still dear friends. It is a great job for the right people, but VERY stressful -- I can't believe some of the stuff we put them through (and some of the other stuff we got away with that they never knew about)....
It bothers me a bit that they restrict these roles to married (presumably hetero) couples. Kind of flies in the face of all their lip service to diversity. But in keeping with their "Judeo-Christian ethic" I guess.