Adding trailers (like towing trailers) to the vehicle shop

If I add trailers to the vehicle shop and a player purchases it, what options are available to store the trailer in either their garage or a lot to spawn them etc whenever the player wants to use one?

Any help?

add them to the dealership and they store in the garage, Thats the way i do it

How do you store the trailer in your garage? Just move the garage locations into the open so they can park on them?