I'm a bit biased since I'm an Escalera reseller. Take a look at my site and I have a video of me moving a Flintstones up the stairs and also using the forklift attachment to lift the game up and put it in a truck or add/remove legs.
I've had guys sell other brands to buy an Escalera. Call me anytime and I can answer any questions you might have about moving games, what accessories you might want or need. I can give you pricing etc.
I just moved today the head unit to a Skee Ball into my showroom by myself. Had to go up three steps and over a threshold. No problem using the Escalera.
I go to many of the shows and have a booth there with an Escalera there so you can see it in person. Next show I'm scheduled to be at is Pinball Expo in Chicago in October.
Ask yourself this question. Is it worth screwing up your back trying to move these games?