The seller advised me of issues she had been having with the tenant including having more pets than allowed which resulted in a flea infestation of the entire building.

DAY 1: We go looking at properties: we saw 3 properties.The first one had the signs (and smells) of a rodent infestation in the basement and the upper unit was in need of complete rehab.

Heck, lots of people move because they are living in a bed bug infested building and want to escape, not realizing that they are bringing the bed bugs with them when they move; this is another aspect that the Philadelphia law fails to recognize.

They will then come out for any other issues like a hornets nest or an infestation that needs treatment at no additional cost.

The cost for a tenant to move from a great landlord and home is significantly higher than the 5% so they will stay and probably say thanks.If the previous year had some drama at the home the tenant wasn't responsible for such as a flooded basement, leaky roof, rodent infestation, noisy neighbors, etc.... you may get some push back on the increase and the excuse they need to move.  

Purposely infest the place (if possible ) with some fast breeding bugs, then watch them WANT to get out as fast as possible :) You could hire someone to do this for you maybe :) 

View, fairview you are seeing anywhere from 800 for a 2 bed ( a very run down roach infested 2 bed) to 1250 at the higher end for nice clean places.

The place was infested with bugs, which I treated for several months. 

Crime and drug infestation. 

@Phil WellsWe know New York is a disease infested, dense, polluted, expensive and terrible place to live.