A long time ago I bought a truck with a liftgate. Money well spent.
But there have been times when I don't have the truck or a dolly
handy.
In those cases I've found two items very helpful. A wood stool
a couple inches higher than the distance between the floor and rear. bottom
of the cabinet. Put the rear of the cabinet on the stool, remove rear
legs (and backbox if possible, or lay it down and strap it), then
remove stool and set back of machine down. Lift front of machine
up and remove front legs. Then the next tool comes into play:
a large skateboard. Get back of machine on skateboard to
position it next to tailgate of truck/suv and set it in. Works
good on hard surfaces but not lawns or dirt.
Easy-peasy.
Steve