I am not sure that over the long haul multihulls will have less depreciation than monohulls. I have asked a number of surveyors who have surveyed multihulls what have they been seeing. The reports have been disconcerting. The opinion seems to be that the production cats are being pretty lightly engineered and constructed. Multihulls have much higher stresses than monohulls. The surveyors have reported an alarming amount of stress cracking at high stress areas on comparatively new Multihulls. The surveyors thought that it was pretty unusual to find a monohull
with the kind of flexure cracking that seems to be nearly universal with multihulls, but if you did, they would be greatly depreciated relative a more soundly built boat.
I am not sure that this quite that cut and dry. While the current
crop of Multi's do not seem to be holding up all that well, which would suggest a more rapid depreciation after 10 or so years out, it is not that simple. There is a comparative shortage of supply relative to the demand for cats and new construction costs rising pretty quickly due to the ramp
up in crude oil
cost. So contrary to the former discussion, that would seem to suggest that Multihulls should hold their value pretty well.
At some level I see this as being somewhat like what happened with the J-30's. The J-30's continued to be a competitive one design class long after many great boats of thier era (anyone remember the Kirby 30) had become simple asterisks in the anals of sailing history
. As a result they held their value for a very long time after they were built. But early J-30's had a lot of coring problems. As these problems became more widespread in the fleet, J-30's seemed to drop pretty quickly in price
from the mid-$30K range to the low $20K range, even on boats that were essentially sound, on the theory that it was only a matter of time before even a good boat sooner or later developed core
I fear that it may be the same for Cats. If the surveyors are right, that a large percentage of the multihull
fleet will develop a pattern of stress failure, then the value of the current
crop of multi's could drop precipitously at some point 10 or 15 years out.