Variations  -

Gimbal proved to be an excellent comrade in many an adventure

Optional reading - Variations in building techniques: 

Inverted construction - Having seen this done, I don't favor it.  This allows a platform providing stability, puts the difficult back plastering on the inside and allows drainage.  Turning was a most daunting task that damaged the boat somewhat.  

Wooden Rib Formers - Used to stabilize, generally inverted, hull until plastering is complete.  While this sounds like a good idea, we have proven it unnecessary and a whole hell of a lot of work.  After flipping the hull all the wood must be removed and the area in contact with the hull ground down and back plastered.

Up-right method - Dad came up up with the following scheme:  Two very stout overhead beams are erected over the sides of the hull.  All ribs are hung from this using steel rod drilled straight though as nearly all the hull's weight will be suspended from it wen done.  This is critical because the keel mast be plastered from the bottom.  Once done the sailboat moving company can push the trailer straight under it.

Plastering in sections - We plastered two hulls this way to split the very difficult plastering into multiple days.  This works, but I am personally not convinced that is a good idea.  Advantageous in time, number of skilled craftsmen needed and the ability to get plaster and people in and out of the hull right up to the final plastering day, straight through the unfinished hull!  Disadvantage is the risk that the hull may not be as strong (unproven).

Enlisting labor and thought in leu of money produces results that defy the lazy mans replication. You could do it too   (copyright 2010, Ken Adkison.)