Anyone have any experience with those little Bobcat skid steers? I have an area in my yard that is raised about two feet higher than the rest of grade and surrounded by rail ties buried on end about 3 feet deep along with some old long dead stumps, all covered in foot deep 3" river rock. Should I expect that Bobcat to not only scrape and remove the river rock (I know it'll do that), but pull those ties and stumps? Is it strong enough to bring that dirt down to grade also? Anyway, I know I can handle the Bobcat, just not sure about renting anything bigger.