You lost that money because it couldn't be appraised and the same sq ft if it was heated would be worth $200 per sq ft at a minimum in any market which is $80k swing.

He says it can't be a leaking duct in basement  because then we'd get no heat on main level. 

We redid the ceilings (took off the popcorn ceilings), painted the walls, added lights, and added an enclosed arizona room with heating and cooling.

Plumbers come the next day and make a bypass so that heat is restored (400$ service call).

The beach areas, clean and comfortable with a functional pool used to do just fine, now you must be renovated/modern, heated pool, etc to be in the top 10%. 

Tenant agrees to comply with all duties required by Wyoming Statute §1-21-1204: maintain the Premises in clean and safe condition and not unreasonably burden any common area; dispose of all garbage and other waste; maintain all plumbing fixtures in a condition as sanitary as the fixtures permit; use all electrical, plumbing, sanitary, heating, and other facilities and appliances in a reasonable manner; prevent water pipes from freezing by turning off outside spigots, disconnecting hoses, and keeping the rental heated to at least 50 degrees; replace lightbulbs, air filters, water filters, and other consumables as needed; test smoke detectors every six months and replace batteries as needed; immediately notify Agent in writing of any defects or dangerous conditions Tenant becomes aware of; replace broken or cracked glass, no matter the circumstance of breakage, unless the Tenant provides Agent with a police report detailing breakage beyond the control of Tenant; pay to repair anything damaged by the Tenant, his guests or invitees, whether through intentional act or negligence; upon termination, remove all personal property and garbage either owned or placed on the Premises by Tenant and clean the Premises to the condition at the beginning of the AgreementCreate a policy and stick to it.

Do you have forced air heat with ducting?

No heat and water issues are the only emergencies.  

It allowed a developer to sell units at a cheaper price because he kept the underlying dirt and often the buyers didn't realize the building didn't sit on land that was a common element. 

A 110VAC would take too long to heat and would.cost extra in electricity.