And from this point forward will have your guard up so high you will never go through this again. 

Since then my oldest daughter has married, my oldest son has graduated and moved to Oregon, my youngest son has Angelman's Syndrome and we haven't quite figured out the right job for him to do.That leaves my second oldest son, a Junior in high school who is actively involved in Cross Country running and working as a life guard at the pool, along with a full load of classes. 

I tried to Google the info for REI Guard but couldn't find the company.

Trip wires , booby traps , armed guards , big bad dog  or  dont install appliances until the house is done , then change locks and set up cameras . 

There's also very little overlap or guarding of turf here.

Classmates worked in the steel mills, construction and even security guard with a gun. 

I'm stationed here with the Coast Guard.

New Jersey is very rough in re guards to taxes.

Just leave a note saying you entered to fix or service what was needed..if they won't let you in I guess you call water dept and have water shut off at the curb if it's water related.. call gas and have gas shut off at outside of bldg if it's gas related, notify police your building is unsecured and you have attempted to secure but have been barred access and need escort.. and you file eviction emergency action for cause I always have phone camera ready..the he said , she said on this will be a ongoing situation.. get them both out.. mutual lease termination if possible.. just document noise infractions,, and damages,, police calls are not infraction if they call themselves.. if neighbor call police get copy of report.. if you call its a unsubstantiated report/ shows bias and cant' be used as reason for eviction. better if tenant or neighbor calls.One way or the other they will get out.. damages will happen and better to safe guard yourself then to get between 2 crazy people.. the cops out there will tell you the most violent unpredictable calls are domestics.. and people get hurt, killed,, don't let it be you. 

Do you have roaming gangs and have to pay a security guard, or is it easy to find good tenants in the Bible Belt?