I have had inspectors look at rooms on renovations that were not permitted (we weren't even doing work in the rooms) and asked that certain changes to be made to bring the room up to code (it was minimal).

STR markets are tough and change fast, best of luck!

Sometimes using an LLC or similar setup can change how the income is taxed.

As other people mentioned the areas do change pretty quickly. 

I will mention that a hot tub could really increase the frequency of bookings. 

That term is generally used when zoning has change, such that it if the structure were destroyed, it could not be built back. 

I eventually changed it to "100 Road St.

On a per-owner basis the policies will change for occupants over the age of 18. 

Because a large percentage of the charges are base fees that do not change based on use!

If you don't have a key, change the doorknob to an appropriate interior knob that doesn't require a key.I provide my tenants with keys to all doors.