I leveled my base for my shed also I brought in 5 tons of 1/4 granite and it work well But I did use something to put extra weight on the blade.
That reallly is a shame that the bike have to get snowed on. that was the whole purpose of why I built my shed. was accumalating to many toys and could fit my truck in my garage any longer.
I have only had to plow a couple inches so far myself , luckily cause when I went out to the atv the winch was no longer working in the down postion. spent a couple hours fixing some wiring.