Another epiphany has struck me like a bolt of lighting. I quickly Googled the idea and it seems that I'm not the first. There are many trailers made from ladders.
For the trailer to be useful to me, it must function as a ladder, when I arrive at my destination. I'm looking to use it in my tree service business. When I get small jobs where the customer hauls their own debris, I will get there using my battery powered bike. Most jobs are within 5 miles of home.
This guy has compiled a few photos. Google Images has many more.
http://www.mrmoneymustache.com/2014/06/23/how-to-carry-major-appliances-on-your-bike/