Joe
your findings make a lot of sense.. to me especially.
Long ago decided that a plow on the front was faster and covered 99% of the snow I need to remove in a season. About 1400' of drive, with two turn-arounds.
However, many folk do not have a place to push snow off to, so they likely have good reason to have a blower.
Your plan to have the blower on the 3 ph works great... especially for your combination of drives and parking areas needing cleaning.
If I didn't need the forks on the 3 ph for moving firewood on my pallets once each week, then I would for sure have your combo of plow and blower.
Another thing I'd have negative for a blower would be the cleanup needed before it could be stowed away in the shed. A plow blade is quick to knock off any accumulated snow, but a blower would take more time.