Wood chips could be made on your own land from brush and trees. You could grow fast growing populars and harvest them every 3-5 years. They are available from all the tree trimming around town. Why hasn't somebody tried or modified a pellet stove to burn wood chips. They take a whole lot less energy to make. Sawdust is used for pellets and you would need a hammer mill to make sawdust from wood chips. Hammer mills take a lot of power. I was designing in my head a solar powered chip dryer and storage silo. I could use the 55 gallon plastic drums for 12 bucks and take the bottoms out and tape/secure them vertically. Them put a fan to force air through the column and paint it black and power the fan with solar panels. Use a auger to load it and an auger to bring the chips indoors.

Lots of stuff to work out and make. Maybe somebody will make some of the stuff so I can buy it. Namely the mods for my Harmon pellet stove.