Re: Large cabin small sailboat.
Tell us more about the garage limits - building or storage? As I discovered, what you think you can fit in a garage for building and what really fits are two very different sizes! And for storage you'll have to deal with the trailer tongue and/or any aft overhang, which also increases the required dimensions.
It is possible to modify the trailer with either a folding tongue (risky unless engineered right) or a removable sleeve (easier to make safe but more work), allowing the trailer to match the length of the boat. The Great Pelican might just fit, but you'd not be able to walk around either end of the boat once the garage door was closed (assuming the 17' you list above is the interior dimension) -- and you'd have to pull the bowsprit inboard.
The SF Pelican would be a better fit, and you'd actually be able to build it in the garage, but no cabin. They still are quite large for their length, and I've beach-camped alongside several of them here in Northern CA.
I take it you are not looking for a sail and oar boat, but rather something that sails and motors with an outboard - correct? As above you'll probably be better off with either a boom tent, or some sort of temporary fabric dodger over an open boat -- more height, less weight, and more open boat for the nice weather.
"The enemies of reason have a certain blind look."
Doctor Jacquin to Lieutenant D'Hubert, in Ridley Scott's first major film _The Duellists_.