lisapizza, For that kind of money I will build you one that cycles in about 6 sec, will split anything on the planet.
The one I built that is on that tractor can be on wheels. It has a 25hp honda, puts out over 20gpm, 5inch ram, with a hyd winch to bring the woodpile to the splitter and hold the block over the knife.
If you look at the knife, it is made like a T. That way you get two pieces off the bottom of the block while the main block is held by the tongs. If it is knarly, while still in the knife you can pull the block off and separate the hair without fighting it. If the wood doesn't split it just shears it.
That one is a prototype, if I build another one it will be much more streamlined.