I've got to remember this, it takes some pressure off!
It's all just "best guess" right now. Because it takes time and experience to know your style and what tools and equipment you will find comfortable, necessary. So spending less at this time, just for what you know you won't be able to get by w/out, is probably good policy
I built mine with a hinge point just a bit forward of 1/2 way along the trailer bed.
This meant it always returned to the 'down ' position, and the effort to tip it is greatly reduced.
I have a snap pin for holding it down.
The lifting mechanism consists of a pole rising above the front of the trailer about 4 feet. It has a 4 inch pulley at the top.
The winding mechanism is the same used to pull boats onto trailers, they are geared very low.
It is mounted to a horizontal bracket welded to the upright and pointing towards the tow hitch.
It is just far enough back to give clearance for your hand when winding the winch.
Another 4 inch pulley between the winch and the base of the pole near that horizontal bracket helps with the cable being smooth in its operation.
To lift the snap pin is released, the winch operated until the soil starts to move and a locking strut then swings under the trailer bed to hold it up.