Using a machine without a buffer tank is a little different, you will lose some flow and pressure supplying the pressure washer the longer supply hose you run.
I know a few guys that run 200'-250' of supply hose to their machines with no problems but check the flow first to make sure you have good flow. You will run into both residential and commercial with good and bad flow so be prepared. You can always run 2 supply hoses to your machine, get a 3/4" or
1" "T" to the machine and connect both hoses if you have bad flow out that far.
If you have a tank, you can run more and even 2 or 3 supply hoses to make sure your tank does not go dry.
I do a group of schools each December/January and on 1 of them I have to run 500' of hose out to the trailer and if I run both machines, I have to run another section of 600' of supply hose as the other water spigot is further out away from the building. I still have another 200' of hose if needed but only carry around 300' on the trailer all the time but for those schools, I bring almost all I have.