Not to rain on your parade, because I certainly think anyone should do whatever makes them happy with thier own trailer, but I think the Caravel
has the best layout of any airstream. It's small, but it's functional, and flexible. The table becomes a bed, the couch becomes a bed, the shower becomes standing room in front of the sink, and legroom for the toilet.
The main problem I have with your layout is that it loses all it's flexibility. In a caravel
you can seat about seven people (and we have -but they have to stay seated
), but in your layout all you have is the bed or a stool at the bar. I think that would get a little tiresome to live with. I understand the desire for a permanent bed, the main drawback of the trailer is the bed which has to be made every night, but it's awkward to only have a bed to sit on during the day. Ask folks who have grown tired of their 22' CCDs.
I think if I was going to totally re-model a Caravel I would look at the current design for the 16' CCD. Bed in the back, wet bath and kitchen in the middle, table up front. At least you have a little more flexibility. The position of the caravels existing windows might make that a nice little plan.
One last thing, you're black tank doesn't seem to be under the toilet. On the Caravel it is above the floor, and the toilet sits on it. Not sure you want that material to have to travel to the black tank you have planned halfway back. It would probably require a lot more water to flush it over there, and would fill the tank faster.
But I don't want to sound like I'm shooting you down. I think it's great you're looking for a better way.