The Fire Marshal texted me Tuesday after his meeting with other departmental leads from the city. He’s closed the case, and will only stop by the house if there are further credible complaints. During a phone conversation we had on Monday he made it clear he understands the neighbor is a Mrs. Kravitz of sorts, and let me know he told her the tenant is allowed to use the property in any lawful way he sees fit. He basically warned her not to file frivolous complaints. While I am still VERY guarded about this situation, I think I can allow my shoulders to descend below my ears.