This must be dependent on your country's customs, I suppose. I've taken out dishwashers quite a few times and it was actually fairly easy. No wheels, true, but cables and hoses were never much of a problem in my case.
Washing machines, on the other hand, tend to have a brick in the bottom to stop them from walking around on their own.
(periodic recommendation: if you buy a Miele, you will pay twice as much for several times the expected lifespan of a cheaper machine. My parents have a Miele dishwasher that's over 30 years old.)