I'm pretty sure that if you are looking to clean up branches on your property you'll find a little homeowner wood chipper to be very frustrating. For the time, energy, and expense involved there's better methods. Load your pickup with branches and find a drop-off spot. Many municipalities have places that convert such material to mulch.
Those little homeowner chippers might handle your garden trash, but little more. Wood chipping, like wood cutting, requires super sharp knives and real power. I've seen a few of the homeowner machines but never heard anyone speak favorably about them.
Speaking as someone who operates an 80-hp diesel powered chipper, you'd be surprised to see what it takes to turn branches into chips. If all you have to deal with are forsythia bushes of maximum 1/2" diameter, buy a homeowner chipper. For anything more you'll need the real thing. Go to Home Depot (or elsewhere) and rent a 6" chipper. If nothing else, it will give you an understanding for what it takes to reduce limb wood to chips.
If you need wood chips for your chickens, you probably have arborists nearby who would love to dump you off a load. Disposing of chips is a regular cost (and pain in the ass) in the trade.