We have a gas powered one. Try craigslist or facespy. We got ours for $300 works great. Don't use it very often because like you we burn most of them.I have an overabundance of sticks, branches and logs. I usually burn a lot of them, but it's too dry, so I'm looking at purchasing a woodchipper.
Anyone have experience with them? Do the cheap ones work well enough for occasional use? Thanks!
I found the Hügelkultur method of gardening is a better use for wood like that. Had a homeowner model wood chipper and was way more trouble than it was worth and something else to store. It was impossible to get to the blades to maintain or sharpen.