Jeff, are you by any chance related to Rube Goldberg?
Seriously though, the only trailer manufacturer we rep that is willing to do a trailer that tall is Classic out of Sturgis Mi. Here's how I can save you some money;
you work directly with Classic to develop the specs you want, (and they can live with!) A trailer this complicated needs builder/purchaser direct communication. When it's all done they'll give you a retail quote. I'll submit your quote and get a dealer price which I will pass on to you for a 2% cut of the total price.