A normal fence is usually required to back a few inches from the property line, if you had it surveyed and know exactly where that line is, then build it the required distance back, usually it's about 4", so give them the 4". let them challenge you, that's why i said a fast mason, have the wall built then fight them legally if they challenge, at that point it will be up. you have the proof of the property line, let them get there own survey to fight you.

I'm not asking for a legal opinion, but rather somebody who's been through the process before and their thoughts (and knows what to expect). 

do you have legal forms you make them sign?

If tenants rented the house part of that month (before the disaster), then I believe a prorated rent amount is legally due you.

I know i can legally just enter if i want to with proper notice but i dont want to ruffle more feathers.

Is it legal to remove rotting food that might damage the property before the lease ends?

Is this action legal or illegal? 

Anything else goes... as long as it's legal, and real estate related. ;)Excited to hear what everyone comes up with! 

Once you are permitted to live off base that would be my first approach to real estate investing.

Business license, permits, random traffic, neighbor complaints, grease fire risk....and the list goes on.Send them a cease letter (in AZ it is called a cure notice) to correct the violation.