This place is a find! We had a family of 7 staying for a week of our 2-week stay—with plenty of room.
The house was spotless, well fitted out, with every type of kitchen utensil you can imagine and a wide variety of water sport gear and beach equipment. Not air conditioned, but it didn’t matter (even in August) because the breezes blow through, every room has a ceiling fan PLUS other fans.
Owner answered email requests very promptly and even had a blown lightbulb fixed within hours.
Princeville is a manicured neighborhood and very safe. As for beaches: If you are very athletic, there are two fabulous locations within walking distance, though each requires going down a very rough, steep trail. For those of us less athletic, there are exceptional public beaches within 15 minutes of driving; both very calm and challengingly surfy.