The reason was he'd have to buy a pin nailer and the saw - which is costly - I just wish he hadn't said he would have done it in the first place then.

This also possibly damaged the coils in both furnaces.  

It turns out the coil was bad, causing the refrigerant to leak out.

If you also have central air conditioning, the furnace installer can plumb the inside air conditioner drain (A-coil drain) and the furnace drain into the same pipe.Sometimes there are federal, state, or local rebates or tax credits for adding insulation. 

I want to be sure that I have adequate life insurance in place to cover the mortgage on my primary residence, as well as any rental property/s I may purchase so in the even I exit this mortal coil, my family can pay off any debt.The agent I spoke with tried to tell me, "good news... you can deduct this if you have a business..." but I'm not seeing that as the case.

If the budget allows I would stick in gas furnaces with A-coils.

Total repair range $150-400Range- I recommend coil top ranges over glass.

Our next rental is going to get a glass top range (the one in our house currently) and we're going back to one with coils.

As for the unit freezing up; I am a HVAC contractor and if the unit is installed with a blower size that matches the evaporator coil the unit will never freeze up.

If you are just swapping out a new FAU with furnace, condensor and evap coil and not touching any ductwork and don't have to replace line set and can use the existing electrical, you are looking at about $4500 or so for a 4ton unit.