My partner and I spent all of June at Chad and Jennifer's place in Hakalau, and had an amazing time. We stayed in their carriage house, a 1 bedroom apartment attached to the barn area. It felt like a detached guest house though, peaceful and all the windows look east over one of the horse's pens and the water. There was AC in the bedroom but we never used it as they have a clever convection setup that keeps are moving enough to stay cool.
They have a beautiful home, with very tranquil surroundings. The property itself is large enough to stretch your legs, and sits on a cliff above the Pacific with expansive ocean views. There is a great lap pool for swimming, a jacuzzi, and a few sun beds to relax and take in the picturesque surrounds. There are dogs, horses, and a pen with ducks, and a tortoise. It all makes the place feel incredibly relaxing.
Their house is in a residential area so you'll have to travel for groceries and restaurants, but the apartment has a full kitchen we used extensively. The Pāpaʻaloa Country Store and Cafe was our favorite place for smaller grocery trips, and Hilo has a few proper market places (Safeway, KTA, Island Naturals).
This part of the Big Island is really pretty - tropical jungle, waterfalls, beach parks, and river valleys running down the volcano to the sea where you can hike and explore. Chad and Jennifer were great about pointing out the general highlights of the Big Island, as well as a lot of the more local places to go exploring.
I was working remote during the weekdays and the internet was good for most of my activities. A couple hiccups here and there but not a big issue for me.
Chad and Jennifer were fantastic hosts. We felt properly welcomed, and really enjoyed getting to know them over the month of our stay. Good people, beautiful place, couldn't really ask for more.