., the mess is attracting pests, allowing mold to grow, etc.) then I wouldn't worry too much about it.

to me the biggest evidence of global warming is the Pine Beetle infestations.

I got reports from two different pest control companies indicating zero bed bugs were present and I also had invoices showing monthly treatments and inspections (including one two days prior to his arrival and it was vacant until he checked in).

Here are a few items to look out for:1) HVAC Filters 2) Pest control, especially here in the South3) Gutters/water4) Yard/lawn5) Fireplace/Chimney 6) Water heater maintenance 7) Dryer vent cleaning8) Door and window seals 

The client was aware of the issue and attempted to fix it but did not fully resolve the problem, which resulted in an environmental hazard and tenant complaints.Bed Bug & Pest Infestation Lawsuits – Most landlord insurance policies exclude coverage for pest infestation lawsuits, such as bed bugs, roaches, or rodents.

I've also had people in a nice house on acreage skip out and leave it infested with roaches. haha. 

What happens when the HVAC breaks down, plumbing leaks, or pests become an issue?

Even large and small businesses with intangible residual services like TV, internet, security, pest control or the local contractor with remodels in process could fall behind on payments revenue contract. 

Ordinarily I would agree, but you have to account for the fact that the tenant saved the landlord a boatload of money by mitigating the leaking roof before it caused serious interior damage.Also, when I hear of rat infestations, I think of landlords not doing a lot of regular maintenance and housekeeping of common areas.Precedent for the remainder of the lease under a course of dealing theory?

City recently did a building inspection and we noticed the tenant is smoking in the unit (cigarettes and marijuana), food waste everywhere leading to building pest issues, and there are 5 people living there now (3 adults and 2 kids).