Someone should start a thread about how their race car trailers are set up. That would be good info for someone starting up like this.
Nice trailer. I added a electric tongue jack and winch in mine. For security reasons.
I added slide lock latches to the rear door and lock from the inside, just in case someone cuts off the outside locks, they still can't get in.
I also use the electric tongue jack as an anti-theft device. I jack it up all the way and cut the power to it from inside, so one else can lower it onto their truck.
I also have a clevis bolted to the side entrance door and hook my winch cable to it and gently hit the remote control switch until I see tension on the door. Then keep the remote in the garage. No opening the side door without releasing the winch.
I also have wagon wheel style rims and chain the two wheels together. When stored for longer periods.
I also lock all of safety chains (4) with the tongue lock, so no one can use just the chains to steal trailer (my buddies open trailer was stolen this way by just hooking the chains on. (We think, because the tongue had a lock and they took it when no one was home for like 10 mins).
It also has a solar powered alarm system with siren if ever needed.
And, finally, the trailer is backed up to my rear fence I have enough vehicles that my truck is always parked in front of the trailer when not in use and another spare car parked up close to the side door.
If someone wants it that bad they are ready going to have to work for it.
Between all of this, also my Rottweiler and having Smith and Wesson near by I never worry while stored.