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Testing mold yourself is not as elusive as it once was. You can easily test your home's indoor air quality for much cheaper than hiring a mold inspector.
Keep in mind that the most important thing is finding out the source of the mold growth so you don't have a recurring issue.
If you have water damage building material present, you will need to have a licensed mold remediation professional come in to not only remove the mold but sanitize the home