Things the agent will want to know:age of the systems (roof, heat, plumbing, electric)if older, is there any knob & tube or aluminum wiringcircuit breakers or fusesany underground tanksdo tenants have pets (if dogs, what breed)what alarms do you havepitched or flat roofany claim history (check with existing owner)

You may be required to pay for utilities, where not split, and the heating bill may alone throw you underwater on your investment.  

Separate Utilities (Gas/Heat/Electric).

It is nice to have to accommodate for forced air heating and/or air conditioning.

; furnace- are ducts air tight or need insulated; HVAC;  Turn heat down at night.  

So the only thing it has going for it is heat/ac, internet and cable being included. 

added bathrooms, making a total of 3, one bedrooms is in suite, created an open plan, contemporary kitchen with a large island, finished attic and basement, added central heating and air, provided amenities people like as fireplace, wine cooler, wine cellar, smart thermostat and key lock, but mostly we created a contemporary home where there are not many What was the outcome?

The other way to do this is to have a heat treatment done.

I re-sided a substantial portion of the exterior, added heat pumps to all units, new windows and finished out the basement.What was the outcome?

I was able to put in all new plumbing, electrical and heating/ ac which are all coming online now.