I am seeking advice on zero turn mowers. I will be cutting 4 acres (2 of the acres are almost perfectly level the other 2 have slight undulations). I am seeking the best deal and don't know what brand to go with. Also, will a residential line do or do I need to go with a commercial line? I live in Louisiana and also deal with a ot of rain in the grass cutting seasons so I don't know if that affects my decision. Lastly, every one tells me to get a Kawasaki engine in whatever brand I buy- agreed?