I am a homeowner in Mequon WI who is putting in a 46,000 sq ft lawn. My goal is to have a beautiful lawn that wears well for my dogs.The area was built up with a large amount of fill. The fill is clean but has many small rocks, large rocks, some metal piping and busted up concrete. It basically has to be cleaned of surface debris. After this I was going to top it with 3" of topsoil then seed etc... My first question is what I should rent to clean the fill of rocks and prep it. I was told to till in some of the topsoil into the fill which aids in draining-- then more topsoil and seed. Is it worth it for me to take this extra step or should I just prep the fill and spread the topsoil over the fill? The fill does not seem to have any organic matter at all, meaning don't count on the fill to help grow the grass. I figured 460 cu yrds topsoil. If I do incorporate some of the topsoil what equipment should I use. I figured a skid and/or a Harly or Rockhound. Thanks for the advice!