Great question. The answers you've received are spot on.
Two things to consider:
1. It's actually impossible to have a home without mold. Mold spores are in the air, in the grass and in the soil. Mold spores travel on our shoes and clothes when we come into the house from outside, or when we open a door or window and the wind blows into the house. Pets who wander in the yard will also bring mold spores into the house. The question then becomes - as in the case of the house you're considering - is there more mold inside the home at any given time than in the ambient air. It's quite clear that the house you're considering has excessive mold due to a flooded basement, and it very well may be easily remediated by a qualified technician to bring it to acceptable levels.
2. In Indiana, Sellers are required to complete a "Sellers Residential Real Estate Sales Disclosure" any time they sell a property. There is a question on that report which is specific to mold. That question asks, "Have there been or are there any hazardous conditions on the property such as methane gas, lead paint, radon gas in house or well, radioactive material, landfill, mineshaft, expansive soil, toxic materials, MOLD, other biological contaminants, asbestos insulation, or PCB's?"
You'll note that the question doesn't only require a disclosure of a current condition, but also requires the disclosure of the presence of mold in the past. As the new owner with knowledge of mold in the house, you'll be required to disclose to future buyers that the house at one time had mold. That may or may not impact your ability to sell the property in the future, depending on how you choose to remediate the problem and your ability to provide documentation and a warranty of the services.
Principal Broker, REALTORÂ®
MacDuff Realty Group, LLC