In short - get your license.... it's worth it to prevent the pain and hassle of defending yourself in an investigation.At times this business is awesome, and other times it's not incredibly fun - so no matter what niche you pick, you always have to figure out how to mitigate as much risk as you can... and the sandwich scenario you mentioned is fraught with more risk than walking into a room full of angry hornets naked.

Well, if a client of mine sent me a message regarding that type of problem there would be several factors to consider:1) replacing the broken pipes a) what type of pipes am I replacing2) are all of the ceiling joists in good shape3) what areas need to be dried to prevent mold?

Also looking at what preventive maintenance can be done to help reduce future large maintenance expenses.In regards to building relationships, I have a post coming out soon titled Successful REI Takes A Team: Our Roster.

He has not put up a "For Lease" sign outside the building or advertised the space on his firm's website (possibly to prevent offers from other brokers). 

We found BiggerPockets.com by accident searching on Google.  

Sorry, I tried to edit a word on my previous and accidently hit post. ...you can compare the housekeepers daily room list to the in-house and departure list. 

No way to know EVERYTHING when you close on your first deal, but if you know enough then you can hopefully prevent major pitfalls.2.

My younger sister who was a minor at the time got into a vehicle accident which totaled both vehicles and sent one of the other two individuals to the hospital for a few hours.  

An insurance policy does not prevent you from being sued and losing your assets.

I want to prevent the buyer (who is an agent) from moving forward on the deal without me.