That is one of John Marples Fast Cruising designs. Looks like it is well built and would be a great choice for a modern cruising trimaran
. Like many newer designs they do give up some interior
accomadations for sailing performance. It will have the least interior
volume compared to a cat or monohull
tho in that size you should have plenty of room. It will perform better than a cat or monohull
and IMO for sheer sailing fun and pleasure you can't beat a trimaran
. Marples is in Florida
so his boats may not be as well known down under.
Some people have rational reasons for not liking multihulls, want more paypoad, don't care for the differant motion, don't like the non-traditional look, or a firm belief in the stability of the ballast keel
. That's okay we all have to be comfortable with our choices. Your brother on the other hand sounds like a 12 year old boy who swears he will have nothing to do with girls. Has he ever spent any time on a good cruising trimaran or cat? Maybe actually going out for a sail on one might open up his mind a bit.
With the more comfortable motion and better performance of a tri or cat your wife and kids
may even find that getting there is all part of the fun.