And the doormouse said......

Here's the door cutout.  These things are solid, and are 1.25" thick.

The doors have proven to be the biggest pain in the neck so far on the trailer, and have to be cut just right to fit without looking like Van Gogh's interpretation of a trailer door.

 Here's the finished door, ready for installation.



Here's the inside of the trailer with the handle and window installed.  Starting to look downright homey in there.

Door prior to installation.

Door after installation with handle.