Hi Joe,
Welcome to TBN!
Isuspect you will find yourself in the same situation we did with our Kubota
B2320, which, although it lists a total hydraulic flow of 8.3 GPM, anctually has a net of 4.7 because 3.6 GPM is tied up in the steering flow.
Having looked at ways to run a splitter off the PTO, which typically requires a PTO driven hydraulic pump and reservoir to run the hydraulics, it was way too expensive, and not a very efficient way to go.
We were much better off to buy a stand alone splitter (we bought a troy-bilt from Lowes on their 18 mo 0% interest deal). The Honda engine has been low maintenance and starts with one or two pulls every time.
In addition we found out that not needing to have the tractor tied to the splitter made processing our wood much more efficient. The maintenance on the splitter is also a lot cheaper and easier than that on the tractor.
Good luck with whatever you choose, and again, welcome to TBN!
Thomas