Biggest problem we have is when tenants dump food waste & the trash can is immediately overrun with maggots by the time the trash is picked up. 

When he goes out driving around looking at potential rental purchases it would make more sense to have a business so it can be written off (mileage/food, internet, computer, and other expenses) if he is looking to grow rental portfolio but isn't buying an SFR monthly.

Then ask for affordable housing (if that exists) and see if there's any grant monies available.That should be enough food for thought to help you take action!

Mold requires three things: moisture, a food source (usually dust), and time.All you have to do is keep that excess moisture from sitting there.

In bad cases, after about 3 days, it starts to look like a cockroach armageddon with dying roaches twitching as they come out of the cracks to die.Tenant cleanliness, like keeping up with the trash and not leaving water and food out, is paramount in preventing/controlling infestations.

The big three expenses of the American household are housing, transportation, and food.

Of rotten wood is kept, it will be a great food source for termites, which you don’t want obviously

How about for food?

There is a microwave kitchen vent above stove that is always being used when cooking (electric), as well as turned on through the day to help exhale more air from home.

Now will I mention the crime, drugs, unemployment, welfare, riff raff and general misery that is prevalent.Refineries, industrial plants, power plants, military bases, food processing facilities, shipyards, factories, distribution centers, university, etc.