Note: I am a local.
I am a Salt Lake local that lived in AA's neighborhood until recently. I also have local community connections.
<modsnip - baiting by implying inside information which is a TOS violation>
Also, I'd like to correct earlier comments about AA living in the Rose Park neighborhood. His neighborhood is not Rose Park, it is Fairpark. I sold my home in Fairpark last year, and it is literally around the corner from AA's. They are neighborhoods next to eachother, but different, even according to tax documents.
Regarding the fire comments earlier, it is illegal (according to SLC code) to have a fire within 25 feet of a flammable source. Given that I lived in this neighborhood, I would not hesitate to call it in simply because I'd fear for my home catching fire. Homes in Fairpark are close together and for my own personal situation, had my neighbors lit a big fire in June, you bet I would call it in. This is a desert with dry grass and such...a bonfire in close quarters is a no go.
As for his mortgage. Utah has something called Utah Housing loans which do not require a down payment. He clearly qualified under existing mortgage rules, and I imagine made up a lot of his monthly payment in AirBNB income. Side note..AirBNB actually isn't legal in Salt Lake City proper, but that's difficult to enforce.