My top (safe) speed on the road with the blower mounted is approximately "faster than walking". (Would take me a couple of MONTHS to drive to NY.)
This is a 1962 Mercedes Benz Unimog 404. The blower was built by another German company, Beilhack. The blower is driven by a PTO from a diesel that sits on the 404's bed. That engine also drives a hydraulic pump for chute angle & blower height. The 404 weighs 6,500 without the blower equipment, 11,500 lbs as configured here. So I may have you on weight, but somehow I suspect you'd still pull me all over the place.
Unimogs do have some tractor-like features like locking diff (front and rear), some have 3-pt hitches (not mine). I have chains for all 4, which is pretty much necessary in order to cut dense snow drifts. Basically, moving snow is both a necessity and a hobby for me, I just love it.