I do want to bounce back the question of do proper ventilation have any inverse correlation with pests infestations especially mouse and rats in homes?

I'm from omaha Nebraska and know the area these homes and apartments are located and everything you see on that show is real it's sad but it's real most of these homes are paid for by the state or housing so the property owners don't really care too much because they know it's a constant cash flow and the people living in the units don't have the credit to move to a nice place but I don't understand How they can charge almost 700 for rent in an roach/rat infested unit and be able to sleep at night 

They usually do not cover repairs r/t infestations.

Pests don't hang around if theres no food or drink....kinda like people.The Standard Form lease, Maintenance Addendum says" tenants have to keep the premises free from visible infestations of roaches, ants. hornets, bees, mice and other pests".  

I can say first hand that baltimore city is infested by incompetence and thievery, but not incompetent thievery.

But he is worried the entire house in infested and we are going to get trapped into 30k in remediation or something.

But it still has the reputation of being a crime infested neighborhood.

With direct ownership of real estate, there are inevitably unhappy events - roof or furnace failure, rodent infestation, etc - that will cut into your projected cash flow and sometimes make you negative. 

Just research your neighborhood, run the numbers for the kind of infesting you want to do, try to get a loan for it as within a day or two you will have all these answers.

Me personally I started in a tech high school studing Carpentry and did that for a while after high school, worked in the record labels in NYC, club promotion, car sales, medical, insurance, etc... and did a full circle to what I love... something about treading through over grown, vacant, smelly, flee infested, houses has a very theraputic effect on me.