The
Woodmaxx WM-8H is not a Jinma. They're totally different. It is made in China, to
Woodmaxx's specs. They do final QA and assemble some US made parts like knives before shipping. The 8H is hydraulic feed.
I haven't bought a
Woodmaxx yet but I'm going to get an 8H soon. My experience with my current MacKissick
chipper is that old piles are kind of unpleasant to chip. Some woods get hard when dry, and dry foliage shakes a lot of dust loose while chipping. Hydraulic feed will make it a bit better as self-feeding chippers sometimes don't feed as well on hard dry material. I have a lot of them to do myself though.
Hopefully your piles were made with the butts in one direction. Makes it much easier.
Renting has some drawbacks. The rental yards' open 8-5 but with travel time, buffer for traffic, time to check in and out, I'm lucky to have 6 hours of possible use. With daily rental you want to maximize your use which means working all day. It's rare that I have an entire day to devote to chipping. Chipping all day, especially if you feel that you're on the clock, can get tiring. Tired people make mistakes. Most chippers are reasonably safe but a mistake can be fatal. With a
chipper I own I can go chip for a couple hours and get something accomplished.
Besides renting a commercial
chipper you can look into buying a used one. Where I am used ones with an 8" capacity cost $10k and up, and they're very well used. With a self-powered
chipper you have an extra engine to maintain, and a
chipper on a trailer is more difficult to move around than a 3pt
chipper.
Besides
Woodmaxx there's also Woodland Mills, a Canadian designed Chinese built
chipper at a similar price. Their design is different than
Woodmaxx and you may like it better.
Woodmaxx also has US made models.