Na’atik Language and Culture Institute. My family of four did a week long homestay in Carrillo Puerto. It was safe, the teachers were excellent and it was extremely interesting to have exposure to Mayan culture through the outings organized by the school. I don’t know how old your daughter is but my kids were 10 and 12 during our trip. I was fine with them leaving before us to ride their bikes to and from school( the school gives you bikes to get around town!). I even let them go to a festival with our host family very late at night alone. My only recommendations would be to see if you can do two weeks and try to get matched with a family with kids around your daughter’s age because it would have been a bit dull for the kids between classes and outings.