If he's managing to bend the bars on the crate and move it around, it's only a matter of time before he seriously hurts himself. Suddenly crating him when he is no longer used to it will cause all sorts of anxiety issues,.
Can you just unroll a sheet of aluminum foil over the couches? It works for lots of dogs as they don't like the feel of it. And teach him to not get on them when you are home. Or how about buying slip covers for the new ones?
"Education is a progressive discovery of our own ignorance." -Will Durant