You are really moving along there. Glad you decided to share your build with us.
I think most of the folks here do have a sense of humor, and toilet humor... well, that's just funny sh** right there.
So, I like the window/stained glass idea. I actually made a 4' x 8' stained glass for the "Back Bar" at my house. I used a piece of frosted glass (privacy glass) and laid out patterns with a black silicone type affair to represent the lead seams, then filled those with different colors of translucent/clear type paint. It came out real nice and lets you express your artistic side. Go to an art store like Michael's and look for a "Faux Stained Glass Kit" , Walmart has some stuff.. http://www.walmart.com/ip/26003458?wmls ... 72&veh=sem
You may want to consider a sliding door for "El Bano" at some point, on the other hand you really feel like a king when you can sit on the throne and watch the wife work your "Bacon and Eggs",... just sayin'...

So, I am gonna try to make some progress on the black tank today. I need to finalize all the locations and mountings for the tank and shower/toilet combo pan and vent BEFORE I cut the holes in floor and tank and roof. Wish me luck!
You may be able to fold those legs in on the bed if you cut a semi-circle around the bolt in the 2 x 4. If you knock off the corners adjacent to the bolt hole it may pivot?
Anyways, I'm off to the shop. I'll check back with you soon.
McDave