From what I've seen in Asia the plumbing doesn't need to be anything special because it can be just a hose attached to a faucet. I know in the past north American stratas deems this an issue because in the past special plumbing was needed. But with these new washers, dryers and dishwashers nothing special is needed. Even the power input is the same as a TV.
I just took a look at some for apartments and RVs and yeah they just attach to a bathroom / kitchen sing faucet and regular power outlet. Options in north America are very slim. Options in Japan, Korea and Germany are amazing. I might just bring one over from there.