For a 3 pt tractor mount, a question is, does your tractor have Rear Hyd fittings? and how much flow?
I have a
b7800 and got a 3pt and Rear pto pump splitter. It's all self contained, and I think it was my best option for my scenario.
I run the tractor at 1800 rpm and at 16t it has split anything and everything I have been able to load onto it! As fast as I can load/split, toss and load again... it's a great work out!
You can find sub 1k splitters 20t 3pt type for <1K, but if you need the pump and hyd containment it will be 1.3k+ depending on shipping to your location.
Lots of examples, and you should search around, Woodsplittersdirect.com is where I got mine (drop shipped direct from supplier). Super easy.