Yep, once or twice a year is about normal for domestic window cleaning here and its really considered a luxury to have your windows cleaned not almost a necessity as it is in the Uk, partly due to the price as it can get to be fairly expensive and partly because its usually an all day event or at least a few hours so people have to set aside time to have it done
We would not have a round as you know it for domestic, although you can usually bank on your "regular" customers calling about the same time every year.
Price wise, we would be hoping to bill about $75 per hour per man, some would be as low as 40 per hour but below that it really wopuldn't pay
There is a lot more to window cleaning here as a lot of houses would have screens and in the colder climates most older homes would have storm windows which when they work correctly can take about 20 min per window, when they don't work correctly anything up to an hour
Much like the UK, different places have different prices and a real estate website is a good way to figure out where is good and where is not, The higher the price of houses in an area the higher the wages
The site posted above is from upstate NY which is known to have the lowest house prices in the north east, Check one from NY city California, Massachussetts and the same houses will be 3 times the price Check one from down south, New orleons, tennesee kentucky etc and the prices will be lower again, Hope that helps Pat