Next year am steping up. i will be doing more than just my naborhood were i drove my tractor around. I am also buying commercial equitment. I am 16 so I will be doing all residental. what size should I get. Here in Maryland there are some big yards. Right know Im looking at a used 61in ZTR mower and buying a new 36in Metro. I have the trimmer and blower. Thanks for the help.