Yes we don’t do anything like the amount of PW that you do , but Honda said that the 13 hp model wouldn’t run a pump and produce 21 ltr per
muinit ,it would run the pump but not produce 21 , they themselves recommended a bigger machine. I decided to give the B&S a go it’s an awesome machine not cheap I accept but it’s so much better than the Honda , I honestly don’t know how you get the set ups you do so cheap and get reliability , ours aren't van mounted they are all on trolleys as we don’t PW every day , and for roof cleaning like you do a high flow isn’t that necessary but we do mainly drives , car parks ware the higher flow is better for rinsing .