what are hidden costs when selling a rental property.

[Chelle Knijnenburg]

I was told that when a rental house is sold, we would have to "pay back" costs like replacing hot water heaters, HVAC, replacing carpet, painting, etc. that we previously used against income from the rental business and a profitable pet/house sitting business.

I am confused by this and not even sure I am asking in the correct forum. Any guidance would be appreciated.