This is coming along big time.
At risk of sounding critical I just have a suggestion on the looks. Side on - sweet, cool and unusual shape. From the front..... The bedroom over cab is large, brown and oppressive, I'm imagining that coming through a tunnel towards you, be like a rat looking at a big brown poo turding it's way down the toilet tube. Are you gonna put a window up there? That would make a difference, break it up and give you guys a good view