Aloha,
We stayed at D's place for 5 nights and 6 days. Ocean view porch, master bedroom and silence around the place are great if you like it. There are some old gears and necessary items lying around the place that you can use; beach chairs, snorkeling gear, umbrellas, ice box etc. There is a small rocky beach near the house which is ok but be careful with water and rocks around.
There are few items to consider if you decide to AIRBNB it.
About the vicinity:
We had rented a car but still felt that the place is far from both Kona and Hilo centers. You will not find any food or essential item store nearby. Must drive at least 5-7 miles for any decent store. Speed limit is 35 mile/hr on route 11 and 19 so it takes time to get around. Have that additional time on your clock.
About the house:
We felt that the bed sheet, blankets and towels seemed pretty used-up. Kitchen silver wear, appliances need upgrade and unnecessary junk need to be stored somewhere else or thrown away. Kitchen light was not enough as only one was working. Finally, the host (G) was nice, he likes to share a lot of info so ask only those items what you need  . Enjoy your time on the island Mahalo!