if you were going to bike long distances, and you're not in a hurry, this might be the way, as long as you add solar panels, a radio, a couple batteries, and a power assist wheel for going up hills

 https://www.tumblr.com/armengoldira/749163139677995008?source=share

the trailer would make a great expandable camper, with some accordion panels, slide floor panel, etc, so it could double or triple in size when expanded