Everyone is telling you to go big but if you can get by with 25hp you won't have to have tier 4 emissions...
This sounds important but I don’t know what that means. What are tier4 emissions and why are they bad?
That means that you need to have a diesel particulate filter. Most of them are trouble free when new. There are regeneration cycles where they burn off the contents of the filter where you need to throttle up or park it and let it burn off. The big thing is that there is a dpf and some sensors that will probably go bad someday and be very expensive to fix.
