I am replacing coil tops with glass tops in my unit and they are C minus to D but my rents are also increasing by 50-75 per month after renovation.

I already have a flooring nailer, but you can rent them if you don't have one.

Yes, pee is so corrosive that it destroyed the condenser coil.

As you mentioned, my naviens do not help much heating the basement.I heard the coils on a dehumidifier will freeze if run in the winter Don't know about the dehumidifiers freezing but if its that cold humidity is minimal so why run it.

🥶🥶🥶Our tenants had the same issue, and the tech realized that the evaporator coil was leaking.

I am renting out some open space for stockpiling shingles and roof wrap, ice and snow guard, drip edge, coil nails, and plastic caps. 

I replaced 1 light bulb in my condo in 10 years and a coil on the HVAC.

I had already installed a couple of years ago & that ran $1200 with new evap coil, line set & a 1/2 days work. 

TN, CO, IL, IA, WI, etc etc. 

Quote from @Mike Hern: Because it isn't WA, OR, CA, CO, Il, NY or other places that despise investors and hate cops.