You can find 203k Contractors by going to the 203k Contractor Directory located online at http://203kContractors.com . There you will find the knowledgeable/experienced contractors for the FHA 203k loan program. All contractors listed have completed a rigorous 7-step approval process which includes education, testing, consultation, and verification of license, insurance and references.
Contractor Directory for the FHA 203(k) Program
Here is the direct website for the company that posted their ad on backpage.
I would obviously as for references. I hope you are able to find a reputable 203K contractor.
Best of luck,