I am now wondering if getting a Z would be a better choice than a new walkbehind? As I keep getting more and more customers, a ZTR would help me feel less tired and be able to do more, but the Wb I am looking at is basically the same engine and deck as a ZTR,61"/25hp, Can you really cut grass quicker with a Z over a huge WB? They both have the same Blade tip speed of 18500 right? Ive always went with Wbs because you can take them on steeper hills and get them into areas where a Z wouldnt go, but most of the yards Im getting now are basically open fairly flat with no fences or obstacles. I do use a Velke but that gets tiring quick. Price is still a big concern though, the Wb will be around $7500 b the time you add a velke to it, a ZTR is still pretty much more with a 61" and 25-27hp, So are they really worth it?