In my opinion, that is how an occupied house should be shown.The "no showings until an offer is accepted" strategy is widely used, but it also decreases the demand for the property.

Hello, I am in the process of securing my first hard money loan.

Efficient negotiations secured the property for $93,000 on favorable terms.

What happens to original security deposit from original 12mo lease?

Efficient negotiations secured the property for $155,000 on favorable terms.

Otherwise, it may be worth losing the security deposit if the house is in really bad condition. 

If you send the security deposit disposition to the address they rented from you with ADDRESS SERVICE REQUESTED written in the area between the address block and stamp you'll get a postcard back with the details if the mail is forwarded. 

I believe Airbnb has pretty good security measures in place to keep hosts and guests safe, but you can look into that more

Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

Tenant decides not to pay and use security deposit for last payment (not allowed).