Phil, considering your qualifications, I believe you'd be an excellent DAR. Contact the MIDO in the Boise/Nampa/Caldwell area. The MIDO covers more territory than the FSDO and would likely go along with more than one DAR. But, I'm not telling you anything you don't already know given your IA status.
Fred

PS. I paid $400 for my DAR inspection. Very thorough, took several pictures, looked at a lot of my builders pics, and did lots of education. Only had one squawk. I had to change the N number because the Font on the letters and numbers were not block. He signed off on it with the request that I put on the correct ones and send him pics of the new ones via e-mail. Very positive experience.