for the small amount of money you would save vs the potential horror you may face. Get a studio apartment until you actually know a potential roomate. Then have an agreement and move in together.
The wrong roomate can ruin your life.
Or maybe rent a room with a lock, and that way you can share the house, but have a place for your personal belongings.. There is a home in Barahona that rents rooms, and my friend lived there for a year, and it was really nice, comfortable, and everyone was respectable. Just a thought!