Hello Ray. I have more photos at
http://www.sportsmobileforsale.weebly.com. If you want any particular photos or other angles, just let me know and I'll do my best.
Underneath the couch are the following: 2 water tanks totaling approx 25 gallons, the water pump, the fuse panel, and the 12V charge controller. These items occupy most of the space behind the large door under the couch. There also is a smaller door under the couch (perhaps 12 inches wide) that is open storage.
Gaucho couch is approximately 5 ft 10 inches. That is an estimate, but it is within a few inches. I am 6 ft, so I swivel the driver seat around and use that to rest my feet when I sleep on the couch (typically I only do that in the winter with the top down, as the penthouse bed is very comfortable).
Distance from end of couch to rear doors is approximately 5 feet. I just put the van in storage, so I haven't measured this but I can do so in a few days. But I am confident my estimate of 5 ft is pretty close.
Feel free to call me at 720-810-3879 if you have any other questions. thanks for the email.