David and Masako place is spacious enough for 2 ppl. They do not only provide a place for you to sleep, they also provide amenities (drinking water!!!, charging stations, beach towels, and snorkeling gears, etc) to make your experience in Kona a very enjoyable and hassle-free one! They really understand what visitors to Kona need!!!
I would recommend if you plan to explore Kona. You will not be disappointed.