She could either immediately leave or I would have the police and drug task force down here to bust her AND I would immediately evict her.

If you determine that it was a Meth lab, get the police involved.

There is a book called Landlording on Autopilote, I believe was written by a retired police detective turned landlord, that goes in depth on the application issue and discusses all the different application denial techniques there are to get out from these types of situations.

Question is, should I replace current windows, or try to polish them, etc..?

The area has a great rental market with several universities within the immediate area including Yale, Univ of New Haven, Southern Connecticut State Univ, Albertus Magnus and Quinnipiac Univ.As a Realtor, I would refer you to the city's police department website for crime stats in each town. 

Even then, you may be able to defend your "for profit" intention, depending on the circumstances.An analogy: if you wear a police uniform and carry guns - you are presumed to be a legitimate cop (other than in a Terminator movie).

The people at City Hall, police, utility companies know us and our rentals.

If they are modern and the rest of the home is nice it will probably not make a much difference.On a SFR it will impair the use of the yard space in the summer, that will put you in the same category as a corner lot.IMO a lot of major inner city roads are equal or worse than a freeway, because of ambulance and police cars, accelerating traffic and the occasional nonsense souped up car.I down own a property on a major street, so this is just my humble opinion.

turn it over to the copsnext time someone disrespects some ones space in the unit just have the occupant call the police to handle ityou don't know what's going on there they could be on dope or something plus if it is a domestic dispute stay clear that's how people end up getting shot- the most dangerous call to the police-domestic violencescreen your tenants better in the future you wont have these problemsenjoy

Landlord Tenant Board, Landlord Self-help Centre, Police (2x), Sherrif, Superior court justice's office, Bi-law enforcement office, Building Inspector's office, Provincial Offences office, Paralegal.