If you can't find anyone, try using a paint sealant. They are much easier to use than standard wax and hold up for a year or so. We use Griot's, but there are other brands. Because of the clear coat, it will never shine like vintage trailers, but can still look good.
My wife and I can wash and seal the trailer in 2 days—not 8 hour days by any means. Probably less than 8 hours total. It really does hold up for a year. You can wash and use spray on wax periodically and that takes even less time.