Why so many large walk behinds. Everyone in the equipment picture posting has many large walkbehinds instead of regular steering riding mowers. Is it because of access into yards? Most jobs around here are either small or big. Not much that I can really see need for large behinds. Is there big differance in quality? Our bigger jobs seem to require riders because of there size. Are riders junk or something. I just new to this and would like to get lined up with good equipment the first time around.