Hippo-Drones
Pleb
I put this review of the WORX Hydroshot pressure washer that I recently got myself. It is a good bit of kit for those who either have no power or tap near where they wash their bikes!
If folk have electricity and water available I can see why folk would think that. But for a simple and easy to grab and go, it is pretty good value IMO, and if no electric or water, possibly the only option other that a pay per use jetwash at a garage