In my experience, they dont like to be nickel and dimed for a lot of other things. extra to heat the pool, extra for a grill.

Possibly they broke it, or there was a fault in the glass and the heat/cool cycle shattered it. 

As competition heated up more buyers were willing to buy the odball stuff and large liens.

And we're getting into a somewhat heated discussion over what really comes down to the legal meaning of PORTION, which she's apparently unaware of.  

Commercial space rent in the area for similar properties is $3000-$4000/mo but property taxes annually are $25k+, insurance $6k+ and other expenses such as trash, water, heat & electric, etc. 

A common serious issue would be no heat in winter time.

Multiple improvements done on this duplex in 2021, including new roof, gutters, flooring, drywall, electrical, appliances, and heating/cooling unit for the second floor.

The roof leaks and has to be repaired by the time the rain comes and there's no heating or AC units.The partner’s focus on finishing the project to perfection rather than timely completion has further delayed progress, and our financial situation has worsened as we struggle to pay the mortgage.Given these circumstances, we’re considering selling the property.

Traditionally, these would be a door and a window.Minimum ceiling height: At least half of the bedroom ceiling has to be at least 7 feet tall.Minimum window size: The window opening must be a minimum size, usually 5.7 square feet.A heating and cooling element: A heater (space heaters won't qualify) as well as a way to cool it down, whether that's by opening a window or AC.

The areas I believe to have good potential have been flushed with over heated sellers market.