I bought a Sunjoe SPX3000 from amazon on a close out sale. Only reason I could think of was because it was blue not the usual greenish color. Paid $79 , was a steal and worth every cent.
This thing has more that enough pressure without having to worry about it being too powerful. I'm a bit concerned that with the m440s' multitude of cameras and sensors the pressure washers' power might damage something. No worries with this model.
I picked up a foam cannon and
short gun , 50 foot flexible hose and quick connects.
It a cheaper foam cannon and puts a thick layer of foam on the car.
Keep in mind if you go with the Sunjow that adapters connections are m22 14mm. NOT 15mm.
this unit has 2 dispenser bottles but I don't use them. Just leave the setting dial pointing up and the bottle are ignored.
I went through a lot of reviews on YT for Sunjoe and others brands.
Should have bought one a long time ago.
regards