How can I protect myself prior to home purchase?

Pipes burst in the house I want to buy. I am concerned about mold & rot. My agent is a joke. The seller is also an agent and of course has disclosed nothing as the house looks great. I only found out through some additional research. The home inspector doesn't cover mold. I have been told that "mold inspectors" are untrustworthy and they just take a small air sample from one wall. The home warranty doesn't cover mold. Homeowner's insurance doesn't cover mold existing prior to purchase. Any ideas to get a clean bill of health on this house and put my mind at ease?