? on Foam Cannon for Pressure washer

[rdfkentucky]

I have a Craftsman 1100psi electric I bought in 1997, and a RiDGID 3000psi gas. I bought the craftsman for cleaning mud off my 4 wheeler and the RIDGID to clean the house.
The foam cannon sound like something to try. How would one work to wash down a house with vinyl siding, and other structures?