Before I set out on the building the Warram Pahi
63 I test sailed an existing 42. Well when I say test sailed I mean I was just on-board. It was a force 5 gusting 7 and it was the owner that did all the work and at ease I might add.
I think the key to your answer is not in the size of the boat but the size and style of the rig. Most Wharrams are undersailed so you'll not break any records in them but they are safe.
42 had a single mast
wingsail rig which is very easy to handle and reef in if need be. We overtook every monohull
struggling to stay upright in the gusts with three cups of cocoa on the helm
, yeah in all the jumping up and down trimming sails
and pulling ropes the owner still managed to find the time to make cocoa. I was watching the cocoa like it was a spirit level and with the cocoa not needing gimbals the vessel never felt so solid and I was completely sold.
Catamarans are given the nickname "The Landrovers of the Sea" and for good reason. The Pahi 42's are one of the more popular builds so there's plenty of them out there on the second hand market, quiet reasonable too for a 42ft cat.