Enclosed Car Trailer Buying Help!

To minimize the chance for a "break-in" as opposed to stealing the whole thing, I have the doors double-locked. Ramp door has padlocks on both sides using the swing-arm locks while the walk-in and escape doors have the standard dual-lock latches as well as the swing-arm (or whatever they are called) over the top of them. All padlocks keyed alike, including the one used on the tongue latch. A u-bolt/ball lock is also used up front.