The Photos are straight from the Hobie Owners manual included with each boat...
Upside down is the preferred Hobie storage method and on a couple of sawhorses is perfect.
The alternate approved upright Hobie method is with the cradles with are about $250.
BUT...

...off the record...
IMHO...I've stored my Hobie's on the PVC pipes on my trailers for years, covered and outside.
I haven't found any problems with deforming of the hull and it seems to work for me...