Before you remove any mold, have it tested to see what it is.
There are some out there that will outlast any bleach you spray it down with, this has to do with the parts per million in bleach VS the mold you have. So don't just think you can clean it up yourself and it goes away.
Testing this will let you know if you can DIY .
The problem of spreading it around while you clean it up is also a factor, some mold only goes dormant and waits years for another moisture source.
I agree that some out there feed at the trough on the mold issues and are scaring people into things they could take care of with a little knowledge, however there are some things you don't mess with until you know for sure what you are dealing with.
Testing is not more than a few hundred dollars....anywhere.
And the testing company can give you information on how to deal with it...sort of like payin for some schoolin, and piece of mind.
How much is your families health worth?