basic idea for the shower stall & washer/dryer. Shower stall would be enclosed, and w/d turned to face shower. Toilet to left of shower. Sink to right of w/d.
Enclosed Cargo Trailer for Offroad Use - Expedition Portal http://www.expeditionportal.com/forum/threads/39414-Enclosed-Cargo-Trailer-for-Offroad-Use
This would work really well for my tiny home!
small enclosed trailers for sale - Google Search
Contractor Tool Trailer Setup | Trailer: Customizing ideas needed. Long-trailer-pics-5-2010-2-.jpg
Small Hand Tool Rack TB052 For Enclosed Trailers -- Find out more about the great product at the image link.
Not a narrowboat, but a lovely interior that is a similar shape.
YUPPIE WAGON ENCLOSED TRAILER PULLS EASY IN A REAR RAMP OR SWING OPEN DOOR
Luggage Trailers; The Solution to Cargo Space As Americans Downsize to Smaller, More Energy Efficient Vehicles