I am concerned about making the wrong decision on what I should buy for a 48" machine. My company is small but growing and I definitely want a hydro. A Walker is my dream but I do not generate the type of revenue to justify spending 10-12K on a machine. I am skeptical about buying a used one and therefore I am leaning towards a walk behind w/ sulky or a Great Dane super surfer. The only problem w/ purchasing a Great Dane is that the nearest dealer is out of the way in case of emergency. My options for a WB are Ferris, Lesco, Scag, Gravely, and Encore. Please express opinions about the used walker situation and "red flags" to look for when examining these machines. Thanks for the help!