Do yourself a favor and just book this place if it's available. For the price range and probably even for many much higher you will not find a more welcoming couple, peaceful space, and comfortable setting. One of those places you just feel good being there.
We spent three days over my wife's birthday weekend and not only did they remember it was her birthday they bought her a bottle of wine! Not to mention snacks and even a few beers in the fridge upon our arrival.
We slept amazing every night (sleep number bed) and packed our days with activities in the area.
Their orientation and recommendations came in handy multiple times. So much to do on that part of the island I'm surprised the guidebooks recommend more time in Kona.
Last mile or so to their house is gravel but our small rental handled it fine. Location is about 40 minutes from Hilo and only 15 to the park.
Loved everything about it! Thanks Auntie and Uncle!