Gee, Ron!
I admire your ambition.
There is a perfect answer to your problem!
Get the machinery from an old merry-go-round!
It will not only move your trees for you, but can actually move them up to working height, if operated in stages.
Besides, it will give your backyard character!
(might even keep a horse or two for the kids)
Might even leave your wife speechless!
Nah!