If you are staying in Kona and Joseph's place is available, book it. Just stop looking right now and book it. The location is super ideal. 30 minutes to the airport, 10 minutes to lots of restaurants and shops in Kona, grocery stores practically next door. Several State parks about 30 minutes away and Hilo is an hour and a half. The pool is fantastic, there's even a dart board and a ping pong table to use. We used the home as a base for exploring as much as we could of the big island, including the Hilo side. Parking was never an issue and was always excited to be back at his place after a long day of hiking and exploring.
The kitchen, while small, is perfect for everything you need. Lots of appliances to use, and even a bbq outside. There's dishes, cups, mugs, etc. The whole place is pristine. Super clean and makes you feel at home.
Joseph always was a text away, super friendly when we ran into each other in person, but also gave us our privacy to the space.