The most affordable way to handle mold is by preventing it from spreading. This becomes more important in states with high humidity such as Florida, Hawaii, Michigan etc. Here are some steps to follow that can help you to keep mold away. Keep the humidity in check in your home with air conditioners and dehumidifiers.
Use exhaust fans in areas with more frequent water use like the kitchen and the bathroom.
Don't allow water to accumulate anywhere.
Do regular home maintenance and cleaning of your home.
Clean your toilet and bathroom frequently.
Insulate your interior and exterior pipes in winter to prevent them from breaking.
Consistently check appliances like your water heater for water leaks.