I also lock the circuit breaker box and then I put "air conditioner alarm stickers" on everything outside.

Do you agree if this is a typical price to replace a furnace and an ac for a 3B/2B 1400 sq ft home (Gas Furnace, Up to 96% efficient, Up to 60000 BTUh and Air Conditioner, 2 Tons, Up to 18.00 SEER, 71 dB max)? 

I’m planning on installing an electric furnace/air conditioner in both units.

i was covered for the past 3 years and now the new carrier is asking me to make improvements that cost a substantial amount of money....1.) its the summer in philly and tenants have air conditioners in their windows...if i dont have a contractor install metal brackets, to prevent a falling air conditioner hazard, my coverage will be terminated. 

Assuming there is something wrong with the furnace, air conditioner, little water damage or so on.

If you have to replace an air conditioner ($3,500), you're looking at dedicating 6 months rent to paying that off.

I use third party vendors to service the air conditioners twice a year (summer/fall)We also teamed up with an air filter company that will mail filters to our tenants every month with our logo and date stamp  I text and email tenants on New years day to change out the smoke detector batteries I have all my homes professionally inspected with a report and photos prior to move in, move out and renewal time.

The house is advertised as not having an air conditioner.

I would recommend replacement of the equipment .Condenser&Coil 14/2T Up L1MAIN FLOOR PROPOSAL:Provide and Install new Carrier Comfort Series 2 ton 14 SEER air conditioner and matching all aluminum cased upflow evaporator coil.

.), potential cost 5-10K (furnace, air conditioner, water heater, etc.), and cost less than 5K to repair/replace.