> Getting them clean in the sink can use up to 27 gallons of water per load. An Energy Star certified dishwasher can use as little as 3 gallons per load (around 11 litres), according to the Natural Resources Defense Council. [1]
[1] https://www.cnet.com/home/kitchen-and-household/how-much-wat...
Space could be a factor but I live in a 450sqft studio. My washer dryer has about 1 square meter footprint in a closet.
On the flip side, the costs for building a house are getting higher in higher every year not in small parts because the requirements for insulation and energy efficiency where I currently live in Europe have started to become borderline ridiculous.
For the record, I'm curious as to why the attitude of wanting a high standard of living is disconcerting.
I have a dryer but not really any room for a dishwasher unless I got a countertop unit; I live in a normal-sized starter house in the UK.
Many over here (UK) both dry their clothes on lines, and wash their dishes in the sink rather than a dishwasher. Space is a big factor - I've seen walk-in closets in the US bigger than most UK bedrooms. Our houses are much smaller on average.