We had a guy come to the factory I was working in with an IR camera. He made a video of the entire plant, all the machinery and the electrical panels.
The beautiful thing about this is it showed all the hotspots which the maintenance guy could repair. This really wasn't that expensive and it provides a great deal of peace of mind.
I think you could probably get a reduction in your homeowners as well, if you talked to the agent and sent them a DVD of the inspection.