I've had good success just googleing 'RV Mobile Service in [the town I'm in]'. Of course if you're in a remote area, you might have to pay a steep travel charge. If you're lucky and have 2-3 listed, you can call them and get a feeling if they're up to the task. You might need two, one for the house and all appliances, and another one for the chassis, engine, & drive train. I understand it's around $300 for a full inspection and printed eval. You probably want to hire someone who's a certified RV Tech.