I inherited a handle system the same as this years ago and they work well.
But these days I just put my righting rope behind the axle of the wheels as I push them in. This leaves a return which I tie off to mast base. The wheels are pushed far enough back to leave weight on them when I maneuver using the bow and when I put the boat back in the water I simply undo the righting rope from the mast base and pull it while placing one foot on the main beam for leverage to regain the wheels without getting wet.
I find beaches have small surges.
I pull the boat back into shore in an on shore breeze by lifting hulls from rear to stop sanding affect. I wait for a bit of a surge to help me in and on my return a similar surge to help me out.
I don't like to use the "find a friend" method as they are never there when it really counts..Murphy's Law and I like to be self-sufficient.