My guess is that it's just somewhere cheap and convenient to store the trailer for the winter.
Five years ago locked up in a barn at the farm next door to where I live there was the Champion Audi trailer. The farmer kindly let me in to paint the Commer green in 2002 and I was absolutely gobsmacked to see what else was in there, namely an Audi R8 motorsport trailer, I think it was from the Stefan Johansonn car. The farmer, who knew nothing about motor racing, told us the Gulf liveried R8 was actually in the trailer. Unfortunately the rear doors were firmly locked and I couldn't quite make out what was in there even when I climbed on the roof to look through the skylight window. I'm still kicking myself that I didn't get a pic of the Commer next to it.