Worth working out the actual wattage draw from any home sever type stuff, get one of those cheap energy meters that you plug in between the wall and the device and go to town on everything in your house, it'll drive the missus nuts for a week but it's well worth it, it saved me quite a lot realising what was worth turning off and what isnt.
After we got a smart meter about 18 months ago i realised my home server was drawing 130watts that really adds up being on 24/7, i replaced it with an ultra slim desktop with an external hard drive which brought the constant power draw down to 7watts. So before 130w contestant draw is about 65p a day or £20 a month now it's down to £1 a month which i can justify.
I'll echo though that there's no way to avoid dishwasher and washing machine being on pretty much daily if you have kids, there's just the 3 of us and it'll average out to the washing machine on being on at least once a day and the tumble drier. For us though as we have solar panels using the tumble drier in the summer is especially free as long as it's not really cloudy so we never really use the washing line. I wouldn't worry too much about short duration appliances like kettles, hair driers etc, sure they draw 3000watts but they're only on for like 2 minutes tops, lots less if its just for 1 cup of tea.