Your lucky the Home Depot by me only rents a small hand push one with maybe a 8" chipper wheel and a 5-6 hp motor. That was why I bought my own.... Plus I have at least 1-2 new stumps every spring from trees that fall down during winter stormsStumps around here are something like $5-8 per inch at the ground for grinding. I did a job early this spring for two 50' spruce trees with 24" stump bases. Rented the Home Depot grinder, it was an Italian machine with a big Briggs V-Twin maybe 30HP. It had hydraulic swing and raise-lower of the grinder and was on tracks. The grinder worked really quite well. Took some effort, but it took care of my two stumps.