We converted our 60' X 60' barn, so the trailer can be stored indoors; winter, or whenever not in use. No birds, no critters, and no weather to bother it.
In fact, we just finished winterizing it about an hour ago!
I also had 60 amp service ran to the barn, in addition to the existing 110V. It's split at the breaker box, with two 30 amp branches. Also added high-intensity lighting in there, and it's bright as day to work inside.
The trailer shares its space with a boat and trailer, farm tractor, large utility trailer, and other 'stuff'.
Our biggest expense in doing this was adding a 14' wide by 14' tall overhead door, as well as building a gravel drive to the door and inside the barn. I borrowed a neighbors skid loader, so moving and leveling the gravel was a snap.
2016 Coachman Leprechaun, 319DS, Motorhome, Dodge Durango Toad