@Calvin LinHas your HVAC equipment been inspected?

Because I cannot single them out I had to do it everywhere so this costs me over $2,000.00 for equipment and installation.I talked with them again and I told them what my cameras have captured and gave them a 60 days notice to leave (breaking 12 months lease).I did talk to the local police department and I was told that unless I see them exchanging drugs for money there is nothing they can do and suggested I call them next time I see something happening so they can catch them in the act.The day I served them with the 60 days notice they told me that I cannot prevent them from doing their innocent internet business of selling cell phone batteries especially if it does not bother anyone.

"these fees are incurred because we have our equipment in your laundry room."  

I'd leave that out, or change the wording to something along the lines of using surge protectors for sensitive electronic equipment.

@Art Maydan 1). from an insurance perspective, you could be held liable if a tenant is harmed because of non working life safety equipment.  

Is there some little project that you could have the contractor do for the neighbor while they have equipment there?

If it is metes and bounds (ie feet and inch measurements along with direction vectors), then you would measure it yourself either in person with a measuring tape, more sophisticated equipment like lasers, or just draw out the measurements approximately on paper or a computer and see approximately where things stand.

Chances are if the fire department is calling them, they are a reputable company not a fly-by-night gang chasing around fire trucks.To the unfamiliar standard insurance prices seem high until one starts to consider the tremendous amount of capital it takes to have a 24/7 response, a stockpile of materials and equipment and the hefty price tag of liability insurance for this type of work (BTW--all the aforementioned are things your "handyman" likely isn't going to have.)

Unfortunately, most HVAC contractors are more geared toward marking up and installing expensive equipment and less toward problem-solving via less remunerative tweaking of systems.

I run a service bbusiness unrelated to real estate, but I have keys, gate codes, ID cards, passwords, everything I need to access other companies property, equipment, and computers.