another way to see it.
thinking out loud....
with the boat on the hard
it could be an easy days work to measure offsets.
locate stations on the ground and with a vertical offset references
take measurements. (a level is your friend)
...same station points with horizontal references
as long as measurements satisfy the requirements for a half model, you are there.
produce the drawings and model it as a mesh. (i think)
mostly simple geometry...measure and draw.
most old acad programs should be able to handle it.
really don't see a reason for laser scanning, although that would be very cool.
then slice it. seems like the most informative section would be longitudinal.
once sliced into two halves (port and starboard), views can be rotated any which way.
then send it to a printing house with a 3d printer for a physical model.