I saw this on ebay and thought it looked like a great idea for a conversion.

Imagine being able to pull up to a beach, lake...and then lowering the wall and enjoying the view...seems like a great idea. Both side walls drop down on the trailer.

Does anyone own such a machine or want to build such...?

Previous owner says he used it for a mechanical bull business. Now that's a good way to break the bones in your hands and arms...I remember 20-30 years ago, it was a trend for bars to have a mechanical bull, there was one near San Francisco, in Oakland CA.

The guys of course would get intoxicated, climb on the bull and then get thrown around and off the bull, probably breaking/spraining their arms and leg bones and ligaments and the women would climb onboard for wet t-shirt contests and set it on slow motion. If the taliban guys ever heard about this, boy they would go ballistic on this idea....

here it is on ebays completed listings:

https://cgi.ebay.com/ebaymotors/Mobile-Stage-Display-Ven...QQrdZ1QQcmdZViewItem

and here is one picture of the idea: https://www.truckconversion.net/photopost...php?photo=1020

Seems to me to be a bit drafty at times....
But all in all is a bit of a letdown.....
(Sue me! I could NOT resist! Sure- wave the red cape in front of the bull.....)