My son is having several hardwood trees (mostly cherry) taken down in Northern Virginia. The estimate is that there will be about 4 cords of wood cut into 18" lengths. The biggest trees have a diameter of about 30 inches at the base. Of course, there won't many rounds of this size, and the very biggest rounds could be split by hand later. I usually split everything by hand, as I enjoy splitting and it's good exercise. In this case, however, it looks like a good idea to rent a splitter, because of the volume of wood to be split and other pressures on his time (an impending addition to the family) and mine. What size splitter should we be seeking to rent? Any recommendations as to manufacturer or other advice?