If you can store the mill in the garage while you disassamble it and load the pieces on pallets it should not be a problem.
With a pallet jack, you can lower it to slow the speed while you go down hill. You'll need a friend to help, but it should be
doable. I unloaded my Bridgeport from a tilt bed trailer by myself with just a hand wench. Then removed the upper ram/
motor with an engine hoist to lighten it for the roll into my shop. If you and a friend break it down, once the base is in
the shop the rest is a piece of cake. You said you had access to a pallet jack, so you just need an engine hoist for heavy
lifting, pry bars etc. You will not regret the Bridgeport. If something breaks, you can always find parts. With the chinese
mills it's a crap shoot on parts availiblilty.