Have a couple of clients that want washing done. I bought a Generac Prosumer Model 5993. 3000 psi/2.8 GPM. I also bought a eighteen feet extension. I tried this out on my house and it does a pretty decent job. Anybody have any experience with this or any other Generac model? Any other tips or tricks would be appreciated. Will see how those jobs go before I advertise any more. Thanks in advance.