I assume it's probably a wash on making a claim every 15 years?

You need someone that understands restocking and will do laundry as well and can do it on the sometimes tight turnaround schedule that an Airbnb demands.

Your DTI will wash if you are collecting rent on the property. 

Sometimes there’s a $2-300 difference for twice as big, your own laundry, a 2-3 car garage, your own yard for you let or kids with no no shared walls.

Though you save money on franchise fee laundry staff.

We converted a laundry room and hall closet to a 3rd bathroom (handicap accessible) and converted one living area into a large bedroom.

Summer we are near 100% but winter is ~25% making our overall performance about a wash due to management costs associated with the short-term rentals. 

I'm thinking 4M in net worth would be easier to achieve than 400K in annual net income.Then again, there are businesses that throw off a lot of cash, full service car washes come to mind.

Laundry, I've never provided but if I did it would be on a "monthly  rental" type of basis.

Successful agents list properties and have a bevy of wanna be agents on their "team" who show buyers properties until they wash out or get their own listings.