Looking to see if its worth replacing the entire unit or haveit repurposed where each of the units have its own heating gas and hot water units. need advise. 

I have also changed over a former office with a very large heated shop in back and just started a few days ago with advertising it on AIR BnB. 

she maintained that in this super-heated market, that isn't necessary... but every house listing that I've looked at recently (which is a fair number of them) has had images showing a house that looks ready to live in... 

If you have a duplex or larger and only one has furnace then you need to pay for the heat and figure out how to incorporate heat into the rent.  

All utilities are currently combined,(1) Combined forced air heating and central A/C.

Now the heat is upon us.

Oil Heat. 1/2 acre level property.  2 car brick garage.Property tax $3400.

If you like the heat, no use looking in a place that averages 30 feet of snow a year. 

How is the heating system?

His negotiation savvy saved the deal and was able to calm both parties when negotiations were heated.