It's not a display ad, it's an integral part of the forums. The people who do the inspections are volunteer forums members.
Look at the Portal page, down the right side for "Airstream Inspectors." You can do a "find" for the phrase with your browser, as well. Select the state and trailer or motorhome, depending on which you want inspected.
Il Carriaggio — 1975 Argosy 24 | Il Progetto — 1976 Argosy 28 Center Bath | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill