I hired a Toro (Praxis) 28 ton job on Tuesday, it went really well and split everything I threw in it. Iron bark, scribbly gum and the forks of trees you just can't touch with an axe of a block splitter, it just powered through them.
9hp subaru motor running for 5 hours was 1 tank full. If i had the $$ and could justify it, I get one, but $170 for be to process 6m3 of wood in a day, which is more wood than we will use in 2 years, I can't really justify it. And I don't have to do any maintenance on it, I just take it back.