Quoted from chubtoad13:Pinball lifter and pinball tilter are the ideal option. Bruce Nightingale of the Slam Tilt Podcast sells them. I need to get one someday. Besides helping put legs on and off yourself, it makes moving games in and out of a lineup really easy.
http://www.pinballlifter.com/index.php/pinball-tilter
EDIT: I just noticed he sells something called Pinball Helper for $80 that looks like it’s exacly what you’re looking for. It wouldn’t help moving games around but if all you want is something to help putting legs on and off, it looks perfect
The Pinball Helper is well made and adjustable height. It is also padded with heavy rubber to prevent damage to the cabinet. They're great.