I ripped a PHAT bowl and started watching sinners. What are the limitations of vampires?

Is it a property line thing? Is it per room? What defines a house for a vampire? If one got into your house and you ran to a shed would they need secondary permission? What about an out house? Would a kid's treehouse count as a barrier? Does a car count? What about a combi? A winnebago? How about a camp trailer? Does it gotta be 4 walls and a door? What counts as a house? Also what counts as a holy zone? If i hung up a singular crucifix would that keep them out? How many prayers and crosses make it count as holy land? Whats the minimum?