Two seat versions?
One recently watched a series of videos made by a Polish Gentleman, I took to be a retired seas captain, who made his own one bed camper and it was ingenious to what can be achieved, but I wanted a two sleeper and also cut down on many extras, just keeping it basic and to 8.5 Kilos towing weight!
One also wanted to be able to take a passenger on the trike, with a suitable cover and extra batteries and what could be achieved with speed and distance along with safety?
Many people are buying these trikes to undercut road fines and operate for short journeys, cutting down on burning petrol, but one does not know what the legislation and the law of the road may change regionally in relation to what you can do or not and that make the concept pointless cross regional borders!