These boats are essentially scaled-down Cal25s - we haven't owned one but I know of one that was owned by some acquaintances.. it seemed to serve them well. As ever, with boats of that vintage do a real good inspection and a proper survey if the initial inspection doesn't show up anything fatal.
They won't be lightning quick but today's standards, but for gunkholing around the Gulf Islands as a starter it would be fine, if a bit cramped and essentially 'camping cruising'.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)