If you're that worried get a portable alarm system. 

Also, I'm in the same situation with the portable alarm that I use at both my house and the rentals.

I had already purchased an Atari 800 computer for $2500, then a Commodore for about $10,000 with an external hard drive and a Compaq portable computer for about $3500 that weighed about 35 pounds and was the size of a sewing machine in entirely covered with a plastic case.

I used to have a daybed, radio, portable TV, card table and chairs and a "go kit" of kitchen junk.

There would probably be permits, insurance for the event, and rental fees for the land, garbage disposal, portable toilets etc.

I'm also considering portable washers and dryers.

I ran to the car, grabbed my portable voice recorded, shoved it under the tenants nose, (I'm 5"2", so I had a long way to reach) and said, "you have something to say, you say it in this.  

Hi, Zach.Here are some other ideas:- "Portable" wireless alarm system- Motion sensor lights on exterior of home- Mini-blinds on the windows- Lights and/or radio on a timer inside the house- Park a car out front

I always bring a 12" compound and a portable table saw when doing projects.  

I am reminded that the Phoenixville code inspectors -- who come around each year -- look askance at the use of portable space heaters by tenants -- mostly bc of the dangers of tipping, damage to cords, and fire hazard from folks trying to dry damp clothing on them.