Tom Bosley -- who famously played Mr. Cunningham on  Happy Days  -- died this morning at a hospital in Rancho Mirage, CA ...
Average estimates: $250 to $420. Power washers can have pressures of 4,000 psi (pounds per square inch) to lesser pressures of maybe a few hundred and run by gas or electric. This means that professionals will probably use one with less pressure to clean a deck and maybe one with higher pressure to clean a patio.
Older top loader washing machines generally use more water and energy, this is why more modern and energy efficient designs are front loaders. A washing machine will use 400 to 1300 watts, with modern Energy Star rated models using about 500 watts. Click calculate to find the energy consumption of a clothes washer using 500 Watts for 0.25 hours a day @ $0.10 per kWh. This is the same as washing twice a week for 52.5 minutes each time.