Were they young? Comment about parent is strange.

Nextdoor is just neighborhood chat and info exchange. It’s not a service. Just hire cleaning company.

100 is rather cheap. Especially if your house needs a lot of work. They doubled it after they figured out how much work it is. I think

It’s entirely possible these people know each other. And it’s possible they share the info re gun safety and this persons parent said she heard you have guns laying around. Possibly

Again find cleaning company but they’ll charge more. They won’t clean for 100 bucks