I'd love to know how heavy and how aerodynamic a bike trailer can be and at what speed it can still be moved at certain points.
I was thinking about a bit wider trailer (~1.2m) and rather long (4-5m) but the top is like a hat or deep lid that can move down for transport or taken off. So you have less aerodynamics when moving. And enough width for a nice comfy bed that turns into a recylinging armchair with a topper. And solar.
But I'd want to pull it with a tadpole possibly with a 250W motor and still reach ~15kmh. This is all just fancy ideas so far though.