WOW, good stuff you got going on there! I am currently living in my 7x14 cargo trailer full time, with 305 w solar and shoreline power, with full size shower but still needs some work. But it's like 95% complete. the good thing is that if you don't like than replace it. LOL love these cargo trailer camper conversions.
Thanks for the video, nicely thought out! I'm thinking of doing something similar. A DC fan in floor would be a great addition to pull fresh air though you wall vent. My concerns are first over heating and secondly condensation water. Are you have any issues with water leaks when you driving around?