my question is, i'm planning on buying a walk behind. i have 18 lawns right now. 5 of them are gated. would it be better for me to buy a 36 for the gated or go bigger for the other 13? which would be more efficient? i hear some people say go as big as your budget allows. i'd like to hear some feed back on those who use a 36 and those who went bigger.. all replies are appreciated. thanks lawnwizards.