Hello CPM1
I am an old man and the boat is 70kg, 180cm long. It is very heavy for me! Luckily my car inside measure 182 cm. I have a margin of 3 cm in height. I bent the right rear seat passenger side (we are in France) and I put the boat here. I keep the left rear seat. I attach the coffin with straps on the floor. The boat is rigged inflatable camping pillows.
My car, a Citroen C5 hydropneumatic suspension that I can adjust the height. I fold the first wheels first, I get the coffin, the intermediate wheels carry the coffin, I pushed again and I fold the rear wheels.
The "coffin" is a modified ambulance stretcher.
The cradle down on which is placed the boat is adjustable in height depending on the slope.
With 70 kg it is impossible to get off the boat by hand. It is a 12 volt electric winch multiplied by a pulley that lowers the truck slowly on the scale of 3 meters, I can add another level of 3 meters. The truck is built to scale well to stay on without leaving tracks. there
I am very happy with this system. I can take photographs of the work. Anyone can do it without heavy machinery