The mortgage is $1400 and the house is worth $250k.I did tell him if it is okay for him,I could take up the mortgage and he says he would get back to me as he also as a brother and uncles to talk with.The house is close to my work place as well.Please, does anyone has a thought on this?

That’s what really makes you happy.A good workplace doesn't happen fast.So, what does a good workplace have?

After diligent searching there are ZERO duplexes for sale within an hours drive of my work place.

One bad situation can harm all the properties.

I am asking anyone knowledgeable to provide any measures or strategies that could materially make a difference in heading off the risk of serious financial harm of the eviction process with non-paying tenants.

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

No harm no foul.

Check your lease, but in any standard lease, there will be some clause that says they have to abide by laws and/or not bother their neighbors or cause disturbances, etc.This means, you can say they have violated their lease - which then gives you the right to give them a remedy or quit notice.I have to agree with the others - even if they are sweet, and the notice of violations only boil down to the dogs running around and not necessarily doing any kind of harm - they are now your liability.  

If you give contractors a prize for finishing early on time, they will finish then to get the prize, but there is plenty that can be left undone without you knowing that will harm you later.

So if there is any kind of physical harm to the tenant say due to slipping on the stairs etc. the tenants renter insurance will cover the medical cost.