We've use several different models, both hover and wheeled, but my personal favorite and the favorite of all our employees is the Landa Water Jet. Yes, it retails for something like $1,600, but you can probably find it for $1,000 to $1,200 from a dealer or even less used. Yeah, you can probably add a ball valve and hook a wand to a cheap unit, but we use our surface cleaners a lot and the Landa holds up better than all of them. Plus, it's the easiest by far on your arms and wrists. It's kind of like the difference between driving a Cadillac and a Geo. Sure the cheap hover model might get the job done, but I'd rather spend more money on something that's going to make the process go faster and be more confortable while I'm working.