Interestingly, where I live, a lot of homes and businesses have water and mold problems. They are bought and sold with hardly a blink of an eye. Apparently it’s only the places that have been flooded that are considered a toxic mold problem.
To resolve the problem people around here just perfume the heck out of the place and keep going. I am really allergic to both mold and fragrances, so there are a lot of places that I cannot go into.