I agree with webman that it is worth getting a fair estimate of the actual money involved. If someone has a tame electrician friend, they might wire in a temporary meter to see if you are talking about tens of dollars or thousands of dollars. Or, you can get cheap kWh counters that plug into individual power points so you can see what one run of the washing machine or dryer is using. Then multiply a reasonable guesstimate of numbers of runs over a year. I expect the dryers use considerably more than the washing machines. If nothing else, encourage the use of clothes lines – the most cost-effective, directly-renewably-powered, readily-available appliance there is.