The advice on the C25 owner's forum (Catalina - Capri - 25s International Association
) is, generally, to get a long wheelbase pick-up truck to tow a C25. Some are using Jeep Grand Cherokees or the like with success, but others have said that something akin to a Tahoe (if I recall correctly) was pushed around by the boat not too long ago when it caught some uneven pavement. With trailer, the C25 weighs somewhere in the 5500-6000 lbs ("dry"); add in gear and you're looking at easily 6000 lbs. Build in a 20% margin of error/safety factor, and you'll need something that is rated in the 7000+ lbs towing range. I'm not sure of your model year, but technically the 2012 with the HD towing package is rated to tow 8700 lbs, though the "standard" version is only rated to 6000 lbs ( towing specs here
). So you might be ABLE to tow it, assuming you're properly equipped, but whether it's advisable to ACTUALLY pull a 25+ foot long, 6000+ lb object behind your 17' long, 5500 lb vehicle is another story, and a decision I'll leave in your hands.
FWIW, I'm a new owner of a 1984 C25 and don't have a trailer for mine. We've decided that, at least for now, we'll keep her in the water and at a marina over the winter, so the lack of a trailer isn't a big problem (though having one would be nice). The 25 offers significantly more room in the cabin (it's amazing what 3' will do!) than most 22's, and the layouts are much nicer. If you're going to pay for a slip anyway, I'd go for the 25. Sure, you'll pay a bit more for the slip, but the bigger boat will be nice. For reference, mine is a family of 4, with 2 kids (6 and almost 4). We looked at 22's and 23's, and I'm really glad we went with the 25. Also a FWIW, while I have a swing keel and probably would get it again, I'd give the wing keel very serious consideration if I could find one. I imagine that the peace of mind of not having to worry about whether a massively heavy object might break free at any moment and disable/sink your boat would be kind of nice.
You didn't mention, is this your first boat? Do you have any experience with sailing? If you haven't sailed before, I'd respectfully suggest learning on something smaller before moving up. The 25 is my first sailboat, and I'm not incredibly experienced, but I logged many hours in smaller craft (14's and 19's) before deciding a) to buy, and b) to go with a 25. Much of this aspect of the discussion is probably best moved to a different thread, or you're welcome to PM me if you want more info.