We loved our stay at Josh's cabin on the northern coast of the Big Island. It was the perfect introduction to the Hawaiian islands. As others have written, it is a rustic setting in the middle of nature, with modern amenities. The bathroom and kitchen appear to be recently updated. We only prepared breakfasts (with fruits left by Josh or foraged on our own!) but the kitchen had enough tools that you could easily throw a simple dinner together. On clear nights Josh's cabin was the perfect spot for stargazing. Never in my life have I seen stars as brilliantly as from this location. It was magical. Josh's wife Melinda offers massages if your schedules align.
Two suggestions before you arrive, be sure to coordinate exact directions before you plan to arrive. First, Google maps worked for us but Apple maps placed the property a few "blocks" away. Driving through the bush in the middle of the night, maps were only slightly helpful anyway. You need directions that involve markers like macadamia orchards, gates and mailboxes. Second, see if you can borrow a fan from Josh. Most evenings there was a strong enough breeze to keep the cabin cool, but not enough to keep nighttime mosquitos from feeding on me.
I would definitely visit again.