Also, in the event of major damage, usually 50% or more, you have to rebuild to Current zoning. 

In the event of termination by Tenant prior to completion of the original term of the Agreement, Tenant shall also be responsible for lost Rent, rental commissions, advertising expenses and painting costs necessary to ready premises for re-rental.

Regardless, outside of an Act of God event, she is responsible as the tenant to what happened to the window and if she says she doesn’t know…it’s on her.

I recommend joining Facebook groups and attending networking events in your area with like minded individuals to build your knowledge and network.  

I'd recommend going to local real estate networking events and meeting other investors in the area.

I literally bugged the owner (politely and nicely) twice a year, for 11 years, as I would see him at the same two community events.

Talk to your tax person...should be a non-event in 99% of the cases.

With that said, I think my interest would depend a great deal on who ultimately is in attendance at these events.

In the event your local or the national economy goes into decline, investments in other countries could still be safe.

Start growing your network, look on Facebook/BiggerPockets for different events, find a mentor who is doing what you want to do, and get to know the local lenders/brokers.