Housing for study abroad

Is there a trusted organization that can assist US citizen students who are not able to get into school housing from a university abroad? D is applying for a fall semester at Yonsei University in Seoul, South Korea. There is no assurance of on campus housing for all international students as its very limited and also there has been an increase in international student application the past few years. She was given an option for maybe finding a host family. The uncertainty on on-campus housing is already a big deal to us. If we can find a safe and vetted alternative off-campus housing for D, I think we may consider letting her proceed.

Any advice?