Consider a larger keel boat Captain
While you want to go around the next point, your children are going to get bored and someone will want a porta-potty. I think you need some kind of ballast to make it fun and stable, a cabin to get out of the sun, lay down, play games, read books, store some food and the porta-potty, especially if you're not the captain. Get the smallest boat that fits your needs, each of your needs. I have a h216. Huge cockpit, very small cabin, 500 lb lead centerboard so can be beached, positive buoyancy with the APC, high freeboard so is very dry, but new, so more expensive than other options, and rain can get in around the mast without great care. This, like others, is a great boat to help your family feel confident sailing.APC is 1/4 inch acrylic on the outside with 1-4 inches of foam and fiberglass inside. Tougher than fiberglass.If i had a mooring, i would start with a 26 foot boat also.But more importantly, get the boat your wife wants to trust your family in.