If you ask the manager to justify a fee and he starts hemming and hawing, move on or require them to remove the fee.

It's actually a gold mine because you have much more control over your buildings and the residents in it and the Vacancy Rates are held incredibly low because rent-regulated apts are basically removed from the available housing stock, lowering the supply of apts, as well as other factors including AirBnB.I have also seen abuse go both ways where Landlords purposely harass tenants.

After a plumbing, AC, a giant dead 200+ year old oak tree removal, and the “good” tenant leaving 6 weeks of repair and cleaning work, we had to unload the property.

One of the best benefits in real estate is your ability to physically effect your investments and change outcomes to an extent with preparation and research. 

In addition there are considerably increased costs when it comes to re-roofing the property when panels need to be removed and reinstalled.I see no financial upside for you as a landlord and can invision several down sides.  

No lawn care, no snow removal, and no garbage expense either for me.

I had to pay the ~$100 of water that I used - and they removed the additional charges. 

This way you can effectively get in with no money and use your future revenue to pay the landlord.

Also it is ungodly hot in PS in the summer and the vacancy rates go up because its the snowbird effect.

About 15 years ago, my dad removed the swamp cooler and installed a HVAC unit on the roof of her unit (he is a HVAC contractor).