Regarding the power supply if you have a 30A 220V available isn't it possible to tap a 30A 120V off of that? I don't know but I bet someone here will know if that is possible.
You can technically use only one hot leg off the 220V to do that, but since I have my 220V car chargers on that same circuit that wouldn't be a good idea.

All good though, after far too much research I'm leaning toward either the Direct Lift PP9, the Advantage 9000XLT, or even the Backyard "Wide" buddy. The headquarters for the Advantage/BYB isn't far from me either, less than 2 hours away.
Highlights/Pros for each - they aren't wildly different in functionality or price from each other, all can lift higher than I need, have similar accessories, work with my existing electrical, and should work well in my garage.
DirectLift PP9 - $5700 picked up + 1600 for flooring inserts: A bit shorter in overall length (pro for me as I won't be loading trucks), shorter overall height of posts (also a pro as I could move between bays without hitting a beam between)
Advantage 9000XLT - $6000 picked up + 1000 for flooring inserts: 5 year warranty, aluminum ramps included standard, more robust 5x5 boxed post design, can be set up for 76" or 79" outside ramp width
Backyard "Wide" Buddy - $7500-ish picked up including flooring inserts: US made!, 5 year warranty, boxed post design, MASSIVE ramp width (86" outside edge to edge) and drive through width
Man, these things have gotten expensive! Just a few years ago I swear I was looking at a 3500-4K budget for the same
