Now that I think about it, I really think they should really classify it as a mental disorder.

If you go with Section 8, my advice is don't put up with the riff-raff, enforce your rules, and evict disorderly or destructive tenants.

Tenant therefore agrees (a) torefrain from any behavior which is loud, obstructive, rude, offensive, boisterous, or disorderly; Any violation of this paragraph may, in Landlord’s sole discretion, be cause for termination of the Lease and or Tenant’s tenancy."

Having said that, all problems can't be solved, and tenants with personality disorders do not behave rationally. personality disorders are intractible, and largely unteatable; as a result I work very hard to avoid tenants with personality disorders as they cannot be reasoned with.

So you stay out of it and if there are real complaints then there are acceptable channels to pursue them through e.g. disorderly conduct has the police called etc. 

Way later I was diagnosed with Bipolar Disorder.

They also have a dog which, if not in a cage, would prevent showings.The tenants are ex-military and they show signs of bipolar disorder (nice one day and explode at you the next).

Any person who fails to allow this grace period may be criminally prosecuted as a disorderly person. (45) So if you have a 5 day grace period on your lease you're doing so out of the kindness of your heart.  

They are willing to pay upfront 4 month rent (3 month plus a security deposit ) and to sign a two-years lease.However, the boyfriend had two criminal records in the past one when he was 16 (Violation Of Compulsory Attendance Req Child), and another one when he was 18 (Disorder Conduct Hazardous/Physi Off), I am not even sure what those violations mean but should i even pay attention to them since they happened over 4 years ago?

Police say the party's organizer, identified as 29-year-old Armando Sotelo-Carrillo, is facing recommended charges of disorderly conduct and contributing to the delinquency of a minor.