Hi Mark and welcome.
No, you are not mad, some of those interior shots are wonderfull
Electric powered boats are becoming more popular but unfortunately, methods of battery recharging as a constant cruiser are going to be your biggest problem.
Without mains electricity, the only method available would be a large generator. this rather usurps the whole point of going electric, you may as well just use a conventional engine.
Bio fuel is an option, but how would you obtain it on the cut?
With regard to paintwork, a beautifully airbrushed boat would I suggest, only provoke admiring comments and interesting debate.
Good luck with your quest!!