My wife and I thoroughly enjoyed our stay at Eric's house. When we arrived late at night with the house lit up it looked like a space ship on a lunar landscape! The kitchen had everything you could ever need and the bed was really comfy. The far reaching views from the porch were spectacular in the sunshine and at night you could sit out and stargaze as there is virtually no light pollution. Volcano National Park is about an hour away and if you decide to go to Mauna Kea I'd recommend going East via Hilo, it may be slightly longer but the West side roads are slow and there are roadworks east of Kona Airport. The Volcano Winery just down the road from Volcano National Park is worth a visit whilst you're there.