Concidering ideas i'll give you that.
The family is coming to look after the hotel. Kind of like the situation in the movie The Shining. Mother, father, brother and sister, just the way you like it. It's winter, the area's cut off from major cities. However, the hotel is located in a residential area. In addition to it, a small settlement with a bar, farmland and a few families living there permanently. The family decides to take such an adventure because of the disruption in the family. The parents tolerate each other only because of the children. The couple's sex life has long been, shall we say, in an inactive state. Is the father redundant? Great, let's remove him from the story and make the reason for arrival financial difficulties. And then there are a lot of options for development, from paranormal to psychological or even in the direction of horror. You said something about realism, people sometimes do unthinkable things, and everything I described is possible.
You want something spicy? There's a small settlement, people used to being cut off from society. People who grab every chance they can because of their circumstances, not because they want to.
I've given enough, I usually get paid for more than that.
And at the end, God, the models you're using, it's quite a sad sight.