Hi,
I am new to the forum but I thought I would chime in. I guess to answer your question to give you "my opinion", then we need a few more details as you may not have what it takes to run the hydraulics of the splitter.
1. What is your hydraulic flow rate of you tractor?
2. Do you have the auxiliary ports at the back of your tractor for a few connections?
3. How many cord a year do you split? And what kind of wood, how big, do you need 16,20,30 ton splitter?
If your flow rate is say 5-8 GPM then you will pretty much have to get a smaller splitter or PTO driven splitter.
If you don't have the auxiliary ports at the back then again you will have to get PTO version.
The PTO version is quite a bit more then just a regular hydraulic tractor splitter, see it here:
3PT Tractor Log Splitter | Wood Splitter | Attachment
If you only do 1-5 cords and you have the connection and flow rate I would say use your tractors hydraulics. It really does not take that long to split that many cord a year and not put much time on the tractor. In mu opinion that is what tractors are made for (multiple uses). But if you plan on doing dozens of cord a year then I agree with admin that it may be quite a bit on the tractor.
PTO splitters cost as much as a good regular log splitter. So many factors. hope this helps a little.