john wrote:

A chain hoist properly fastened to the garage ceiling would make
unloading easy. A couple of tempory vertical columns on each side of
the ceiling attach point would hold 1000 lbs.


A very risky thing to do since "Properly fastened" and properly
supported can be complex. Basically the hoist needs an independent
support structure to carry the load and not rely on the building
structure for anything but lateral support. Spending the $500 or so on
Harbor Freights small gantry is a much better idea and the repair cost
when you collapse the garage ceiling and the roof or room above it will
be a lot more than $500.