I ran a 6' McKee Snolander 520 behind my '64 MF 35 Utility. With some conveyor material added to the fan, lots of rear weight and tire chains, I went through some gnarly storms. I went out late at night and blew a 5' deep x 5' wide plow dump at my mailbox clear across the main road in three swipes. (two for the majority of the snow, the third swipe to get whatever fell off the top)
My machine is around 30pto HP.
My father uses the blower now, I have a company vehicle that I can use for personal stuff with a Boss v-plow. Now my pup sits next to me in the heated seats while I plow us out.
Edit: We had a storm a few years ago that dumped probably 3' and drifted to over 4'. The business behind my house closed for the day, the roads were downright treacherous. Since the business was closed, whomever plows it waited to do it last. I take care of the entrance (we share an entrance) like it's my own, mostly becasue if we need emergency services at home, we'd be out of luck. Too far to try to walk through to get to my house.
Fired up the old Massey, let it warm up, got to cutting the path in. I cleared the entire entrance from my driveway to the state road that I live on, plow berm and all. When I saw the plow guys out there they thanked me, because they wouldn't have been able to get in past the plow line at the road's edge. It was like packed cement and 4' high. I blew it all right across the road.
If that happens again, I'll miss having the blower at my house...